U.S. aircraft bombed the offices of a radical Shiite leader Monday in southern Iraq. Meanwhile, armed insurgents shot and killed two foreigners working in northern Iraq. U.S. warplanes bombed the Sadr City offices of wanted radical Shiite cleric Moqtada al-Sadr early Monday morning. The attack came one day after raiding the offices and arrested two people.

American military officials said the offices were destroyed.

Sadr City was the scene Sunday of armed battles between coalition forces and members of the cleric's Mehdi Army.

In northern Iraq on Monday, gunmen armed with machine guns opened fire on a vehicle in the city of Kirkuk, killing a South African, a New Zealander and an Iraqi. The two foreigners worked as engineers for an Iraqi construction company. The slain Iraqi was their driver.

In southern Iraq, oil exports were halted from the Faw Peninsula after insurgents blew up a pipeline feeding the oil terminals there. The U.S. Army Corps of Engineers said the pipeline was still ablaze Monday morning.

Northeast of Baghdad Monday, a convoy carrying the governor of Iraq's Diyala province was attacked with a homemade bomb. Iraqi police said the bomb exploded as the convoy passed by. Two bodyguards were reported to have been killed, and three others were wounded. The governor was reported to have escaped unharmed.

In the flash-point city of Fallujah Monday, more than a dozen U.S. armored vehicles entered the city. A joint convoy of U.S. Marines, Iraqi Civil Defense Corps and police arrived at the mayor's office located in the center of the town.

U.S. military officials in Fallujah talked of positive cooperation with Iraqi security forces that will take over security in the war-torn city, where a truce has been in effect following intense fighting there last month.