The U.S. military says an American soldier has died while conducting a combat patrol in Baghdad.

A statement released Friday says the Multi-National Division-Baghdad soldier died Thursday. It does not provide further details.

The incident is under investigation, and the soldier's name is being withheld pending notification of next of kin.

The death raises the number of U.S. military personnel killed in Iraq to at least 4,252 since the war began in March 2003, according to an Associated Press count.