Taliban militants have attacked the convoy of a private US security firm in western Afghanistan and killed two local security guards. A five-vehicle convoy of the USPI company was travelling through western Herat province late Tuesday when it was ambushed by Taliban fighters, deputy provincial police chief Ghulam Sarwar Haidari told AFP Wednesday. “Taliban attacked a USPI convoy. One vehicle was damaged and two USPI guards were killed yesterday,” Haidari said. Full Story