The U.S. military says an American soldier has been killed by a roadside bomb in Iraq. A statement says the Multi-National Corps _ Iraq soldier died Friday during combat operations in Baghdad. Saturday's statement said the incident is under investigation and provided no further details. The name of the soldier is being withheld pending notification of next of kin. The death raises to at least 4,312 members of the U.S. military who have died in Iraq since the war started in March 2003, according to an Associated Press count.