WASHINGTON -- Citing a need to protect the troops, the Marine Corps operating in Fallujah and elsewhere in the volatile Sunni Triangle of central Iraq is restricting the information it releases about insurgent attacks that kill Marines.

On Friday, for example, a statement from the Marines' base camp outside Fallujah said a Marine had been killed the day before "as a result of enemy action" in Anbar province. In a break from the practice of other U.S. forces in Iraq, the Marines gave no details.

The Army and the Pentagon, in their news releases announcing service members' deaths in Iraq, typically offer a brief characterization of the hostile action, such as mortar fire, roadside bomb or other type of attack. They usually cite the town where it happened; the Marines do not.

The Marines are operating in some of the most dangerous parts of Iraq, and they have had at least 12 of their men killed since they arrived in March to replace the Army's 82nd Airborne Division.