An investigation into the fatal Malaysia Airlines Flight 17 crash remains on hold as international experts canceled plans to visit the wreckage amid renewed fighting in Ukraine, NBC News reported. Officials from the Organization for Security and Cooperation in Europe (OSCE) announced their decision on Sunday at a hotel in Donetsk, a key city to the pro-Russian rebel movement fighting the government in Kiev. Ukrainian officials announced that their forces had made advances in retaking the rebel-held territory, reaching the outskirts of Donetsk.