Heavy fighting at key Syria town Fighting between rebels and Islamic State (IS) militants around the strategic Syrian town of Marea has left 47 dead, according to activists.The UK-based Syria Observatory for Human Rights said that 27 IS fighters were killed, with the rest being from other anti-government groups.Marea lies in an area that Turkey and the US have reportedly wanted to turn into an IS-free "safe zone".Last month it was alleged IS had used chemical ******* in an attack on Marea.