Islamic State militants staged a surprise attack today at a crossing frequently used by Iraqi and Syrian civilians, killing at least 37 people, mostly civilians. Kurdish officials said, the militants struck before dawn after sneaking into the village of Rajm Sleibi, located along a front line that separates the Kurdish-controlled Hassakeh province from IS-held areas further south. <br/><br/>Some militants reportedly blew themselves up at a Kurdish checkpoint while others attacked sleeping civilians in a nearby temporary camp sheltering hundreds of displaced people who fled IS-controlled territory.<br/><br/>