SULAIMANIYA, Iraq (Reuters) - Labourers digging on a construction site in northern Iraq uncovered human skulls and bones on Tuesday, which interim Prime Minister Iyad Allawi said were part of a mass grave believed to contain some 500 bodies. Allawi told Iraq's National Council in Baghdad that the grave was found near the city of Sulaimaniya in the autonomous Kurdish region in the northeast of the country, where Saddam Hussein's forces carried out atrocities in the late 1980s. "Today a mass grave was discovered in the city of Sulaimaniya, with the initial number of 500 martyrs," he said. Allawi...