Two other service members were wounded and transported to a U.S. military medical facility for treatment, it said.
The brief statement gave no further details, saying the incident was under investigation.
The death raised to at least 3,883 members of the U.S. military who have died since the Iraq war started in March 2003, according to an Associated Press count.
Malaysia needs Russia's assistance in maintaining and repairing Su-30MKM fighter jets
Japanese Prime Minister Shinzo Abe said that US army bases will not appear on the southern Kuril Islands in the even Russia delivers them to Japan
Posters for the play "Adam and Eve. Life after Paradise" with pictures of dancers Arsen Aghamalyan and Oksana Vasilyeva were banned in the city of Tver, Central Russia