British counterterror police arrested two more people Wednesday in relation to the London subway attack, bringing the number to five.
Detectives arrested a 48-year-old man and a 30-year-old man under the Terrorism Act in Newport, Wales. A 25-year-old man was also arrested in Newport on Tuesday.
Two other men arrested over the weekend — an 18-year-old refugee from Iraq and a 21-year-old from Syria — remain in custody. Neither has been charged.
Extensive inquiries are ongoing and searches are ongoing at four addresses.
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"We anticipate that the searches will take some days to complete and may cause further disruption," said Dean Haydon, head of the Metropolitan Police Counter Terrorism Command.
A homemade bomb planted in a rush-hour subway car partially detonated Friday, injuring 30 people. The attack sparked a huge manhunt for the perpetrators, and prompted the British government to briefly raise the national terrorism threat to the highest level.