Kurdish forces battled Monday to cut a key Islamic State supply line by seizing the border town of Tal Abyad, as terrified Syrians poured into Turkey to escape the fighting. Forces from the Kurdish People's Protection Units (YPG) backed by Syrian rebels advanced on the southeastern edge of the border town overnight, backed by US-led strikes against IS fighters, a monitor said. The Syrian Observatory for Human Rights said Kurdish forces had seized the Mashur Tahtani area on the southeastern edge of Tal Abyad, with the US-led coalition carrying out at least five strikes overnight. "The strikes are paving the...