10 U.S. Troops Killed in Iraqi Violence

Supporters of an anti-American cleric rioted in four Iraqi cities Sunday, killing eight U.S. troops and one Salvadoran soldier in the worst unrest since the spasm of looting and arson immediately after the fall of Saddam Hussein.

The U.S. military on Sunday reported two Marines were killed in a separate "enemy action" in Anbar province, raising the toll of American service members killed in Iraq to at least 610.

10 US deaths - worse day ever as Iraq plunges toward civil war