An Afghan soldier who shot dead four French troops has said he did it because of a recent video showing US Marines urinating on the dead bodies of Taliban insurgents, security sources told AFP. The attack on the soldiers, who were unarmed, came on Friday at a base in eastern Afghanistan and left 15 other French troops wounded, eight of them seriously. “During the initial interrogations by French soldiers, he told them he did it because of the video in which American soldiers were urinating on bodies,” an Afghan army officer said. The report was backed by an intelligence source and another with access to information from the Afghan ministry of defence, both of whom requested anonymity. “In…