A car bomb exploded in central Baghdad as the Iraqi higher education minister's convoy passed by on Wednesday but he escaped injury, Interior Ministry sources said. Two of Sami Al-Mudhafer's bodyguards were wounded and a civilian was killed in the attack. Interior Ministry sources earlier said it was the education minister, Abdul Falah Hassan, who had escaped the bombing. It was not clear whether Mudhafer himself was the target of the attack as bombings are sometimes directed at any convoy. Meanwhile, an unmanned US aircraft went down near Sadr City, but the cause was not immediately known, the military said on Wednesday. The aircraft belonged to Multi-National Division-Baghdad forces and made a 'controlled parachute landing' on Tuesday, a military statement said.