Kurdish-led fighters advanced slowly Saturday under the cover of US-led coalition air power in Syria's northeast. Intense clashes with ISIS militants took place around a prison where thousands of extremists were held, officials said.
Fighting broke out Thursday night when ISIS unleashed its biggest attack in Syria since the fall of its so-called “caliphate” three years ago. More than 100 militants assaulted the main prison holding suspected extremists in the northeastern city of Hasakeh, sparking a battle with US-backed Kurdish fighters that has so far left dozens dead.
