In other Iraqi violence, a roadside bomb struck the security detail of Baghdad's governor, killing one person and wounding six others, an Interior Ministry official told CNN.

Gov. Hussain Tahhan was not traveling with the convoy in central Baghdad when the bombing occurred.

Also, another bombing killed an Iraqi soldier and wounded four others when a roadside bomb struck an Army patrol in western Baghdad on Thursday.

In the Sadr City fighting, clashes between U.S.-supported government forces and Shiite militias raged in the sprawling Baghdad slum area through the early morning hours.

The new fighting came despite an agreement reached between the Iraqi government and cleric Moqtada Sadr to halt the fighting in Baghdad. A security official in charge of enforcing the peace agreement told CNN the plan to bring calm to Sadr City was still at "square one."