Three other service members were injured in the attack, during which the gunman was "engaged and killed", according to the US military.

The attack on U.S. troops in Iraq is the first to inflict casualties since the fall of Syrian President Bashar Assad a year ago.

DAMASCUS, Syria: Two US service members and one American civilian have been killed and three other people wounded in an ambush on Saturday by the Daesh group in central Syria, the…