Two US Marines died west of Baghdad - one in fighting and the other in a non-combat incident, the military said Thursday. A Multi-Division Baghdad soldier also died of non-combat causes. A Marine assigned to Multi National Force - West was killed Tuesday while conducting combat operations in Anbar province, which stretches from the capital to the borders with Jordan, Syria and Saudi Arabia, according to a statement. Another Marine with the division died the same day in a non-combat incident, the military said separately. It said the incident was under investigation.