( AP ) - Three American soldiers were killed and two were wounded by a roadside bomb in east Baghdad, the U.S. command said.
A U.S. statement said the bomb was an explosively-formed penetrator, a type which the U.S. says Iran has been supplying to Shiite militias, a charge the Iranians deny.
The U.S. said the blast occurred Wednesday in east Baghdad but gave no further details.
Last week, anti-American cleric Muqtada al-Sadr ordered a six-month suspension of operations by his Mahdi Army militia.
U.S. officials believe mainstream Mahdi forces have generally stuck by the order but breakaway factions of the militia are continuing attacks.