On Monday a senior U.S. administration official told reporters that Turkey's Syrian Islamist ground proxies are "going to unguarded prisons and releasing ISIS detainees - then blaming Syrian Democratic Forces."

And following prior reports since the start of Turkey's 'Operation Peace Spring' of mass ISIS prison breaks as Kurdish positions came under Turkish artillery fire, more former US captives are taking advantage of the chaos. 

"The Kurdish-led Syrian Democratic Forces (SDF) and Syrian Observatory for Human Rights said Sunday that close to 800 members of a camp holding the families of ISIS fighters had escaped after Turkish shelling," according to an NBC News report. ISIS jail breaks have been reported in places like Ain Issa and Qamlishi city, near the Turkish border, among others.