Daesh attacking a prison in Hasakah.

The siege of the Ghweran prison in Hasaka, where thousands of jihadists and their family members were detained after the collapse of the Islamic State’s so-called caliphate, was well planned.

The commander of the Syrian Democratic Forces, Mazlum Kobani, said ISIS had mobilized sleeper cells and used suicide bombers to organize the breakout.

The fight to retake the prison, the S.D.F. said, was constrained by the militants use of the young detainees as human shields. It said the children were in a special rehabilitation section inside the detention center, which was built as a training college.

“The Syrian Democratic Forces holds ISIS terrorists responsible for causing any harm to these children in prison,” the militia said in a statement. (Source )