This was CNBC's live blog tracking developments on the war in Ukraine.
U.S. Secretary of State Antony Blinken is meeting Ukraine's president and other senior officials Kyiv on Tuesday, with the visit designed to bolster Ukrainian morale as its forces battle a large-scale Russian offensive in the northeast border region of Kharkiv.
The visit to Kyiv, which was not disclosed beforehand, is the first by a top U.S. official since Congress passed a $61 billion military aid package for Ukraine in April.
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Blinken's trip is meant to send a strong signal of reassurance to the Ukrainians during a "difficult moment" for the nation, a senior U.S. official told reporters as Blinken travelled from Poland to Kyiv overnight.
"It's a tough fight. There is no question," said the official, who spoke on condition of anonymity, noting, however, that the U.S. has "a lot of confidence that the Ukrainians will increasingly be effective in pushing the Russians back as our assistance flows in both from the United States and other allies and partners."
Blinken's mission on this trip is to talk about how U.S. supplemental assistance will help shore up Ukraine's defenses, the official added, and to discuss other steps the U.S. is taking to shore up Ukraine's security.
Money Report
Russia's Putin and China's Xi to discuss Ukraine, trade and Middle East, Kremlin aide says
Russian President Vladimir Putin and Chinese President Xi Jinping will discuss the war in Ukraine, developments in the Middle East and international cooperation with organisations including the United Nations, among other topics, Kremlin aide Yuri Ushakov said Tuesday.
"The topic of connecting integration processes within the EurAsEC and the Chinese "One Belt, One Road" initiative, the situation around Ukraine, the situation in the Middle East, Central and North-East Asia will be considered," Ushakov was cited as saying by Russian state media agency RIA Novosti in Google-translated comments.
Ushakov said it was important for the relationship between China and Russia to be resistant to external pressures, and that Russia appreciated China's "balanced position" on the conflict in Ukraine.
Putin is set to travel to China this week to meet with several senior Chinese politicians, including Xi.
"The leaders will have a one-on-one conversation, they will walk in the park next to the palace, drink tea, obviously. And then informal negotiations will take place during an informal dinner with the participation of some members of the delegations from both sides," Ushakov said.
He added that a visit from Chinese government officials to Russia was also being planned for this year.
— Sophie Kiderlin
Russian strike hits residential high-rise building in Kharkiv city center, mayor says
A strike on Ukraine's Kharkiv on Tuesday hit a high-rise residential building in the city center and injured at least nine people, its mayor Ihor Terekhov said in Google-translated Telegram posts on Tuesday.
No fire broke out as a result of the strike, but a search of all apartments in the building for victims was underway, he added.
It comes after several strikes hit Kharkiv earlier in the day, according to Terekhov. Several residential buildings, garages, a school and cars were damaged by the attacks, he said.
CNBC could not independently verify developments on the ground.
Fighting has intensified in the Kharkiv region in recent days as Russia has launched a fresh offensive in the area. Russia has claimed that it has made gains near Kharkiv since the latest offensive began.
— Sophie Kiderlin
France to deliver military support to Ukraine in coming days
France is set to provide military support to Ukraine in the coming days and weeks, the French government said Tuesday, according to a Google-translated statement.
French President Emmanuel Macron and Ukrainian President Volodymyr Zelenskyy spoke on the phone earlier in the day about developments on the ground, the statement said.
"The President of the Republic reiterated France's determination to provide all the necessary support, over the long term and with all of its partners, to defeat Russia's war of aggression. He was also able to detail the deliveries for the coming days and weeks in support of the Ukrainian military effort," it said.
In a post on social media platform X, Zelenskyy said that he had also discussed the upcoming peace summit with Macron.
"I appreciate France's important role in implementing the Peace Formula, particularly the nuclear safety point," he said. "We discussed the importance of encouraging countries from the Global South to attend the summit and coordinated positions on this matter."
— Sophie Kiderlin
Georgia passes contentious 'Russia-style' law on foreign influence
Georgian lawmakers on Tuesday passed a so-called "Russia-style" law on foreign influence, despite some of the largest demonstrations the country has seen since declaring independence from the Soviet Union.
Members of the Georgian Parliament physically came to blows as lawmakers held the third and final reading of the foreign influence bill, before ultimately approving the legislation.
The law calls for media outlets, nonprofits and other nongovernmental organizations to register as "pursuing the interests of a foreign power" if they receive more than 20% of their funding from abroad.
The U.S. and European Union had repeatedly warned Georgia's ruling party of pushing ahead with the legislation, which critics say could undermine the country's chances of joining the EU.
— Sam Meredith
Poland to boost intelligence spending due to Russian threat, says PM
Poland will allocate an additional 100 million zlotys ($25.30 million) to boost its intelligence services, Prime Minister Donald Tusk said on Tuesday, as he warned of a rising threat from Russia.
Poland says its place as a distribution hub for supplies to Ukraine has made it a key target for Moscow's intelligence services, fears that were exacerbated last week when a judge who had access to military secrets defected to Russian ally Belarus.
"I decided to allocate 100 million zlotys from my own reserve, the reserve of the prime minister, to strengthen the internal security and intelligence agencies," Tusk told a news conference.
He said that Russian efforts to destabilise European countries, particularly Poland and the Baltic states, were set to intensify in the run-up to European elections in June.
"We will have to invest more resources, time, more actions when it comes to our special services," he said.
— Reuters
Innovation, arms and manpower: Russia's incoming defense minister signals priorities
The Russian official expected to take over Russia's defense ministry has set out his main priorities for the armed forces, saying advanced weaponry and equipment, adequate ammunition, military innovation and bolstered forces were among his main tasks.
Andrei Belousov, who has been put forward to lead the defense ministry by Russian President Vladimir Putin, said "the enemy is learning quickly."
"The situation related to the use of new technologies changes literally every week. And here we need not just learn, we need to preempt the enemy," Belousov said at a plenary meeting of the Federation Council, where consultations on his appointment to the post are being completed.
He said that Russia needed to work out "new methods of waging warfare," according to comments translated by Reuters.
Belousov also said Russian forces needed to boost their numbers further but said this did not automatically mean another round of mobilization would take place. Russian officials are cautious around the topic of mobilization, given that an initial draft prompted thousands of men to try to flee the country.
"I specifically want to emphasize to journalists that we are not talking about mobilization, about some kind of emergency measures. We are talking about planned measures, but this process has already been launched, both the call of citizens and, especially important, contracting," he said, news agency TASS reported.
— Holly Ellyatt
More on Blinken and Zelenskyy's meeting
When U.S. Secretary of State Antony Blinken met Ukraine's President Volodymyr Zelenskyy in Kyiv, what was at the center of talks? State Dept. Spokesperson Matthew Miller released this comment:
"Secretary of State Antony J. Blinken met with Ukrainian President Volodymyr Zelenskyy today in Kyiv. The two discussed recent battlefield updates and the importance of newly-arrived U.S. security assistance to helping repel Russian attacks.
They also discussed long-term security arrangements and ongoing work to ensure Ukraine can thrive economically. Secretary Blinken reiterated the United States' enduring support for Ukraine's sovereignty, independence, and territorial integrity and our commitment to Ukraine's recovery."
President Zelenskyy posted a statement on Telegram:
"Visit of U.S. Secretary of State Anthony Blinken. The situation on the battlefield, support for our soldiers and further defense cooperation were discussed in detail. In particular, we talked about Patriot systems for Ukraine, for the protection of our cities and communities, such as Kharkiv and Kharkiv region. Two "Patriots" for the Kharkiv region could significantly help protect lives from Russian terror.
Preparations for the Global Peace Summit were also discussed. It is important for us that the United States, President Biden participate, and that America's role in maintaining a rules-based world order does not weaken.
Thank you to the American people, the U.S. Congress, the House of Representatives, President Biden and his team for supporting our fight for freedom and independence. We appreciate the decision to continue U.S. support for Ukraine and today we talked about how to implement the announced aid packages as quickly as possible so that the weapons will work in the hands of our soldiers as soon as possible."
— Holly Ellyatt
Russia says its forces have captured another Kharkiv village
Russia's Defense Ministry said its forces in Ukraine have seized another village in Kharkiv, where intense fighting is taking place as Ukrainians try to stop a Russian advance in the border region.
"Units of the Sever [North] group of troops, as a result of active actions, liberated the village of Bugrovatka, Kharkov region [Buhruvatka in the Kharkiv region] and advanced into the depths of the enemy's defense," the Russian Defense Ministry said on Telegram. Russia uses Soviet-era spellings of Ukrainian place names as an attempt to "Russify" the country.
The Russian Defense Ministry said its forces also defeated two Ukrainian brigades around the settlements of Vesele, Vovchansk and Lyptsi in the Kharkiv region. It said a counterattack was repelled in the area of the village of Starytsya.
CNBC was unable to immediately verify the latest battlefield report and Ukraine has not commented.
Seizing the town of Vovchansk is an immediate goal for Russian forces who are looking to advance to Kharkiv city, the second-largest urban settlement in Ukraine after Kyiv.
— Holly Ellyatt
Conflicting Russian and Ukrainian reports over fate of border town Vovchansk
A Russian official claimed Tuesday that Russian forces have control over the western and northern parts of the town of Volchansk in Ukraine's northeast region, with street battles now taking place there.
Vitaly Ganchev, the head of the Russia-backed civil-military administration in the area, told Russia's Channel One that Russian forces were closing in on the town, a hot spot in the war since Russia launched a new offensive to seize the border region.
"While the Ukrainian armed formations are still resisting both in the city itself and on the approaches to it ... at the same time, the western and northern parts of Volchansk are already controlled by Russian troops, our guys are now continuing to move into area of the meat processing plant and so on," he said, according to comments reported by state news agency Tass.
"Convenient positions are being taken for further advancement in the city and the suburbs around Volchansk," he added.
Ukraine's military appeared to contradict the summary, however, stating that the situation in Vovchansk was "under control" while conceding that it had pulled back troops to new positions near the village of Lukyantsi.
"Due to the intense fire influence of the enemy, namely air strikes ... on our units, to save the lives of Ukrainian soldiers, a change of positions was carried out in the area of the settlement Lukyantsi. The fighting is going on," the General Staff said in an update on Facebook. CNBC was unable to verify either battlefield report.
— Holly Ellyatt
Ukraine' top military spy says situation in Kharkiv region nears stabilization
The head of Ukraine's military intelligence agency said on Tuesday the situation in the Kharkiv region was moving towards stabilization but that Russia may send in more reserves in the coming days.
Russia's military had also stationed small assault units near Ukraine's northern Sumy region, GUR agency chief Kyrylo Budanov told Ukrainian TV.
— Reuters
Ukraine derails Russian freight train in drone attack, Russian media
A Ukrainian drone attack derailed a freight train and sparked a fire in a diesel tank in the southern Russian region of Volgograd, mangling several hundred meters of track, Russian media said on Tuesday.
Russian Railways said simply that the derailment was caused by interference by unauthorized persons, but Russian media said the train was attacked by a drone.
Footage published by Baza, a Telegram channel linked to Russia's security services, showed freight wagons strewn alongside a railway line.
"As a result of interference by unauthorised persons into the operation of railway transport, cars of a freight train derailed at the Kotluban station," Russian Railways said.
"According to preliminary information, there were no injuries. At this time, train traffic in the area of the Kotluban station is suspended."
The storage tank and cars with lumber caught fire and the blaze was extinguished, Russia's RIA state news agency reported, citing the emergency ministry.
TASS, another state news agency, cited emergency services as saying that 300 meters of track had been damaged in the incident.
There was no immediate word from Ukrainian officials about the incident. Kyiv has said in the past it has carried out sabotage attacks on Russia's railway system to disrupt military logistics, including far from the front lines in the nearly 27-month-old war.
— Reuters
As Blinken and Zelenskyy meet in Ukraine, Kyiv leadership pleads for air defenses
U.S. Secretary of State Antony Blinken met Ukraine's President Volodymyr Zelenskyy in Kyiv Tuesday morning, with the president thanking the U.S. for the "crucial" weapons package agreed by U.S. Congress in April.
Military hardware donated to Ukraine as part of the $61 billion aid package is starting to arrive in Ukraine, a senior U.S. official traveling with Blinken told reporters Monday evening, with artillery, air defense capabilities and long-range ATACMS missiles starting to flow into the country.
Nonetheless, Zelenskyy told Blinken Tuesday that air defense was Ukraine's "biggest deficit," according to comments reported by Reuters, and that Ukraine needed two air defense batteries urgently in the northeast region of Kharkiv, where Russian forces launched a new offensive last week.
Blinken said Tuesday that more U.S. supplies were on the way:
"We also know that in the near term the assistance is now on the way, some of it has already arrived and more of it will be arriving," Blinken said, Reuters reported. "And that's going to make a real difference against the ongoing Russian aggression on the battlefield."
— Holly Ellyatt
Why has Putin chosen an economist to be Russia’s new defense minister?
An economist is not the first person who might come to mind when choosing a suitable candidate to head up a defense ministry — particularly a defense ministry that is three years into an ongoing war.
Still, Russia's President Vladimir Putin surprised everyone at the weekend by proposing (and a proposal by Putin is, de facto, an order) the civilian economist Andrei Belousov to replace his long-standing Defense Minister Sergei Shoigu.
Shoigu, who will become secretary of the Security Council (a role that's seen as a demotion by analysts), had run the defense ministry since 2012 but his tenure has not been without controversy, with a corruption scandal at the Ministry of Defense involving senior officials.
The appointment of Belousov — a technocrat who has served in various roles in Russia's government, including as minister of economic development and deputy prime minister — is bound to raise eyebrows in military circles, but it comes as Putin looks to put Russia's economy on a long-term war footing.
As such, the appointment of an economist to the defense ministry is being widely seen as a way to marry Russia's immense and ongoing defense needs with the economy and military-industrial complex.
Read more on the story here: Genius or madness? Why Putin wants an economist to be Russia's new defense minister at a key point in the war
— Holly Ellyatt
Ukrainians 'fighting back' as Russian forces try to seize border town of Vovchansk
U.S. Secretary of State Antony Blinken's surprise trip to Ukraine on Tuesday comes at what a senior U.S. official described as a "difficult moment" for Kyiv as its forces battle a new, large-scale Russian offensive in the northeast Kharkiv region.
Russia's Defense Ministry has already claimed that its forces have "liberated" a handful of settlements near the border but fighting is at its hottest around the border town of Vovchansk.
Russia has claimed that its forces have entered the town but Ukraine disputes that, saying its troops are repelling attempts to seize it.
Oleh Syniehubov, head of the Kharkiv Regional Military Administration, said Monday evening that the situation in the wider Kharkiv region was "difficult," accusing Russia of attacking civilians and using them as human shields. He called on an estimated 200 people still left in Vovchansk to evacuate immediately.
"The enemy is trying to capture Vovchansk, but the Defense Forces are fighting back. Skirmishes continue on the northern outskirts of the city. In total, since the beginning of active hostilities, our fighters have destroyed more than 1,000 invaders," he said. CNBC was unable to verify Syniehubov's claims. Russia says it does not target civilians, although thousands of civilians have died over three years of war.
Russia's ultimate target in this new offensive is the city of Kharkiv, Ukraine's second-largest city. Syniehubov said battles are also ongoing for the village of Luk'yantsi, to the northeast of the regional capital.
"We record a slight advance of enemy troops, but our fighters are fighting intensively to hold this settlement," he said.
"The enemy changed the tactics of mass offensives, as it was at the beginning of a full-scale invasion, to advancing in small groups. They move through forest strips, plantations, bushes," he added.
— Holly Ellyatt
Blinken's journey to Kyiv: In pictures
U.S. Secretary of State Antony Blinken arrived in Kyiv Tuesday morning, having flown from the U.S. to Poland before taking a sleeper train from the Polish border to the Ukrainian capital.
This is Blinken's fourth trip to Ukraine since Russia's invasion and his first visit since the U.S. Congress finally approved the long anticipated $61 billion military aid package for Ukraine last month. The last time he visited was in September 2023.
High-profile visits of this kind by top U.S. officials often go unannounced beforehand for security reasons.
Blinken stepped off the train in Kyiv the early hours of Tuesday morning local time, and was greeted by the U.S. Ambassador to Ukraine Bridget Brink and the Ukrainian Ambassador to the U.S. Oksana Markarova.
— Holly Ellyatt
Blinken in Kyiv on previously unannounced trip
U.S. Secretary of State Antony Blinken is in Kyiv Tuesday, with the visit designed to bolster Ukrainian morale as its forces battle a large-scale Russian offensive in the northeast border region of Kharkiv.
The visit to Kyiv, which was not announced beforehand, is the first by a top U.S. official since Congress passed a $61 billion military aid package for Ukraine in April, boosting the country's chances of fighting Russian forces who have regained the initiative in recent months.
Blinken's trip is meant to send a strong signal of reassurance to the Ukrainians during a "difficult moment" for the nation, a senior U.S. official told reporters ahead of Blinken's arrival in Kyiv on train from Poland.
"It's a tough fight. There is no question," said the official, who spoke on condition of anonymity, noting, however, that the U.S. has "a lot of confidence that the Ukrainians will increasingly be effective in pushing the Russians back as our assistance flows in both from the United States and other allies and partners."
The official said U.S. military hardware, including artillery, air defense capabilities and long range ATACMS missiles, were already starting to arrive in Ukraine.
Blinken's mission on this trip is to talk about how U.S. supplemental assistance will help shore up Ukraine's defenses, the official added, and to discuss other steps the U.S. is taking to provide long-term assurance and commitment to their security.
Blinken is due to meet Ukraine's President Volodymyr Zelenskyy and will deliver an address that will focus on Ukraine's "strategic success" in the war. The address is due to take place at 11:00 a.m. ET on Tuesday.
— Holly Ellyatt
Ukraine says it prevented Russian 'terrorist attacks' in Kyiv on May 9
Ukraine's security services on Monday said they had prevented "terrorist attacks" by alleged Russian agents in Kyiv that were meant to take place on May 9.
Explosive devices were meant to be detonate in several locations in Ukraine's capital Kyiv, including shops, the country's security services said in a Google-translated Telegram post.
"Improvised explosive devices were disguised in tea packages. They consisted of a timer, a detonator and plastic explosives with an incendiary mixture that was supposed to cause large-scale fires," the post said. The explosives were meant to detonate during peak hours, it added.
Explosives were allegedly also meant to be installed in a car that was to be parked near a popular cafe, the security services said.
Ukrainian security services used counter-intelligence to identify the man behind the planned attack, they said in another Telegram post.
"He personally gave instructions to the recruited agents and even recorded video instructions for installing an explosive device in one of the stores of the same chain in the Moscow region," the post said.
The alleged Russian agent had also planned an attack that was meant to take place in February, which was also thwarted by Ukrainian security services, they said.
Ukraine's Office of the Prosecutor General on Monday said two people had been detained regarding the attempted attacks. One was charged with treason and attempted sabotage, while the other was charged with "an unfinished attempt to commit a terrorist act," the office said in a Google-translated Telegram post, adding that investigations were ongoing.
Russia's Foreign Ministry did not immediately respond to CNBC's request for comment.
— Sophie Kiderlin
Russia has 'partial success' in Ukrainian town near Kharkiv, Ukrainian military says
Russia has had "partial success" in Ukraine's Lukyantsi, a village near the city of Kharkiv where Russia launched a new offensive in recent days, according to the Ukrainian military.
"In the Kharkiv direction, the enemy does not stop offensive actions," the Ukrainian Telegram account for General Staff of the Armed Forces said in a post on Monday, according to a Google-translation.
The update said 11 attacks had already been carried out and two "combat clashes" were underway.
Russia had "partial success" in Lukyantsi, but was prevented from advancing, the military said, adding that Ukrainian forces were carrying out counterattacks. CNBC could not independently verify the developments on the ground.
Earlier in the day, Kharkiv regional head Oleh Syniehubov said Russia was attacking in small groups in an attempt to stretch the front line, Reuters reported.
— Sophie Kiderlin
Russian reshuffle shows it will 'try to scale the war,' Ukrainian presidential aide says
The changes Russian President Vladimir Putin has made to the country's government suggest that Russia will try to "scale the war," Ukrainian presidential aide Mykhailo Podolyak said in a post on Telegram on Monday.
"Russia is finally isolating itself and will try to scale the war, expand its formats, while simultaneously reconfiguring the economy to function in acute/deficit formats, which one way or another can ensure a sharp increase in the military component," he said, according to a Google translation of his post.
The reshuffle indicates that Russia is, among other things, moving towards "military 'communism'" to ensure there are enough resources for a never-ending war, aiming to curb corruption in its army, and that the influence of "traditional clans" is being redistributed.
— Sophie Kiderlin
Russia and Ukraine release updates on 'dynamic' fighting in Kharkiv region
Russia said its forces had improved their tactical position near four settlements in the northeastern Kharkiv region Monday while Ukraine said it had deployed reserves to the area, where Russia launched a new offensive last week.
Russian forces have "improved the tactical situation and delivered strikes at [Ukrainian] manpower and hardware" close to Vesele, Neskuchne, Vovchansk and Lyptsi, Russia's Ministry of Defense said Monday according to a translated Telegram post.
The ministry said Sunday that its forces have seized nine villages in Kharkiv region at the weekend after launching a new offensive in the region.
The General Staff of Ukraine's armed forces said in an update Monday that "the operational situation remains complex and dynamically changing" in the Kharkiv region.
Combat operations are underway in several areas, the General Staff said, noting that Russian forces were conducting assault operations in a number of directions.
Fighting is going on for the border town of Vovchansk, Ukraine's military said, stating that Russia had used "significant forces to attack the city in the composition of up to 5 battalions ... At present, the enemy has tactical success," it added.
"Measures are planned for the destruction of the enemy, which has wedged itself into our defence."
Reserves are being deployed to stabilize the situation, Ukraine said, but it added that one of its main priorities "is the preservation of the lives of our soldiers."
CNBC was unable to verify the battlefield reports.
— Holly Ellyatt
Russia is ready if the West tries to resolve Ukraine war on the battlefield, Lavrov says
If Western countries want to resolve the Ukrainian war on the battlefield, then Moscow is ready for it, acting Foreign Minister Sergei Lavrov said Monday.
Speaking during talks in the Federation Council (the upper house of Russia's parliament) on his reappointment to the post of foreign minister amid an ongoing government reshuffle, Lavrov said "it's their right, if they want to be on the battlefield, they will be on the battlefield," news agency RIA Novosti said.
Lavrov was dismissive of a forthcoming peace summit on Ukraine that will be held in Switzerland in mid-June, and which Russia is not attending, likening the event to "a reprimand for a schoolchild."
Russia has not been invited to the summit but had already signaled it would not attend even if it was welcome to. It has said a peace summit without it is futile.
Russia's leadership has repeatedly warned of the possibility of a direct confrontation between Moscow and the West, threatening that World War III could erupt if Ukraine's Western allies send ground troops into the country.
— Holly Ellyatt
