NEW : U.S. military says an Iraqi soldier wounded Americans . A separate attack wounded another American soldier , wounded , official says . In first attack , Americans also wounded inside an Iraqi army commando compound near Tuz . An Iraqi Interior Ministry official and police in Tikrit said that the man threw two grenades at the convoy , damaging a vehicle , and that U.S. forces then opened fire `` randomly , '' killing a civilian and wounding four others . The American was shot and killed .
NEW : U.S. military says an Iraqi soldier wounded Americans . A separate attack wounded another American soldier , wounded , official says . In first attack , Americans also wounded inside an Iraqi army commando compound near Tuz . The American was shot and killed .