Politicians from Iraq’s Shi’ite majority accused U.S. troops of massacring 20 worshippers at a Baghdad mosque on Sunday but police and residents said many died in clashes between Shi’ite militia fighters and Americans. U.S. military spokesmen declined comment on the accusations but issued a statement describing a raid by Iraqi special forces, with U.S. advisers, on a building that was not a mosque in roughly the same area. It said 16 insurgents were killed. Full Story