BAGHDAD, April 8, SPA -- Four American soldiers were killed in an explosion near their vehicle in Diyala province, the U.S. military said Sunday. The soldiers, all assigned to Task Force Lightning, diedSaturday, the military said in a statement. Another soldier was also wounded in the attack, andevacuated to a U.S. military hospital, the Associated Press quoted the statement as saying.--SPA www.spa.gov.sa/439183