ANKARA, Turkey, Dec 11, SPA -- A heating boiler explosion on Monday knocked down part of a five-storey building that houses military families in the largest city in southeast Turkey, the governor's office said. Ambulances rushed to the scene and rescuers clawed through the rubble, searching for survivors. At least two people were confirmed injured, authorities were quoted as saying by the Associated Press.--SPA www.spa.gov.sa/410298