Clashes between US-backed Syrian Kurdish fighters and members of the Islamic State group killed at least three people inside a restive camp in northeastern Syria that houses IS families, a Kurdish official and an opposition war monitor said Tuesday. The clashes broke out late Monday night atthe al-Hol camp in Syria’s province of Hassakeh, when Kurdish fighters exchanged fire with an IS sleeper cell, according to Shixmus Ehmed, head of the Kurdish-led administration’s department for refugees and displaced. He spoke to The Associated Press via voice messages Tuesday. The fighting involving autom…