Aided by U.S. troops, Kurdish-led Syrian Democratic Forces (SDF) tightened their siege of a prison housing ISIS suspects after inmates took over the facility, residents and officials said on Sunday.
At least 70 inmates were killed in the attack on the prison in northeastern Syria, which began on Thursday. Militants detonated a car bomb near the prison gates, helping dozens of inmates and flee to the neighbouring Ghweiran district of al-Hasaka, witnesses and officials said.
The SDF initially said it had thwarted the breakout and arrested 89 militants sheltering nearby, but later acknowledged that inmates had taken over parts of the facility.
It said on Sunday that 17 of its forces were killed in the deadliest rioting in detention centres holding thousands of suspected militants arrested after they were defeated with U.S. support in north and east Syria.