BEIRUT: An ISIS suicide bomber killed at least 20 regime troops in Hassakeh city in northeast Syria Friday, the Syrian Observatory for Human Rights activist group said.
"The attack by a booby-trapped car targeted the criminal security service headquarters in the south of the city" where deadly clashes have been under way since Thursday, the Britain-based activist group said.
ISIS said Friday it had freed prisoners held at a jail in Hassakeh that it is fighting to seize from government forces.
"The detainees in the central prison have been freed," the ultra-hardline jihadist group said on an official Twitter feed.