BAGHDAD, Iraq -- Seven U.S. Marines have been killed in Iraq, the U.S. command said Tuesday.

Six of 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. Names of the deceased are being withheld pending notification of next of kin.

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

Meanwhile, medical officials said a roadside bomb targeting a U.S. military convoy in Baghdad has wounded at least 29 civilians.

The bomb exploded as the convoy was about to drive into a tunnel in the city's center, and left a yard-wide crater. An Iraqi official said it appeared that two Humvees were damaged. Charred Humvee parts littered the explosion site and seven civilian cars were also badly damaged.

There is no word on U.S. casualties. U.S. and Iraqi forces blocked access to the area after the blast.

The military said a reporter for the Army Times newspaper embedded with U.S. troops was injured in a suicide car bombing in western Iraq.

A U.S. military spokesman in Baghdad, Capt. Duane Limpert, said the reporter injured when the attack occurred around 7 p.m. Monday near the Syrian border. The reporter's name has not been released.

Limpert did not have details on the extent of the injuries to the reporter. He said troops reported only minor injuries.

The Army Times is published in Springfield, Va.