BAGHDAD, Iraq - Six American Marines were killed in action in western Iraq, the U.S. command said today.

The Marines, assigned to Regimental Combat Team-2 of the 2nd Marine Division, died Monday in Haditha, 140 miles northwest of Baghdad.

Insurgents posted handbills in Haditha, claiming to have killed 10 U.S. troops, seizing some of their weapons.

Another Marine was killed Monday by a car bomb in Hit, 50 miles southeast of Haditha in the volatile Euphrates River valley.