The U.S. military said an American soldier has died in Iraq from non-combat related causes, AP reported. The military said the soldier died Wednesday, and that an investigation into the death is under way. A military statement did not say where the soldier died and gave no other details. The soldier's name is being withheld pending notification of next of kin. At least 4,159 members of the U.S. military have died in the Iraq war since it began in March 2003, according to an Associated Press count.