In late March, the Telegraph reported that four Islamic State (IS) militants escaped from the Ghweran prison in the northeastern Syrian city of Hasakah but were quickly recaptured. The Kurdish Syrian Democratic Forces (SDF), which played such a critical role in destroying IS' so-called caliphate, are in charge of the prison. The US military was reported to have provided aerial reconnaissance assistance to support the SDF’s recapture of the IS prisoners. Other news stories said up to 12 prisoners escaped.

The SDF continues to be responsible for the security of the prisons in northern Syria, where roughly 11,000-12,000 captured IS fighters are held.

The March 30 prison incident highlights the conundrum surrounding the IS detainees. Western governments refuse to accept their repatriation, while the SDF believes they should face prosecution inside Syria, if necessary with an international tribunal. 

Although IS no longer controls large swaths of territory in Iraq and Syria, roughly 15,000-20,000 of the terror group's fighters have morphed into an insurgency. IS continues to mount guerilla attacks on Iraqi and Syrian security forces. IS sleeper cells are reportedly planning bombings and assassinations.