QENA - A court in southern Egypt on Sunday condemned a man to death for the January 2010 killing of six Coptic Christians outside a church after a Christmas mass. A Muslim policeman was also killed on January 6, 2010 when three gunmen raked worshippers emerging from mass with bullets in the village of Nagaa Hammadi, near Qena. Threatening to exacerbate tensions between Muslims and Egypt's minority Christians, a suicide bomber killed 21 people outside a church in the northern city of Alexandria after a New Year's Eve mass at the start of 2011.