24 Killed, 45 Injured in Bombings and Shootings Across Iraq

Anger at the United States ran high at the march. A statement from Sadr read at the event praised the slain lawmaker, Saleh al-Auqaeili, for his efforts in "getting the occupier out of Iraq," referring to U.S. forces, according to news reports.

Clashes broke out between gunmen in Sadr City and U.S. and Iraqi security forces beginning Thursday night, according to the U.S. military. One U.S. soldier was wounded by gunfire, the military said.

Four members of the Iraqi security forces were killed in the western province of Anbar, which was a major center of the anti-U.S. insurgency but has quieted enough in recent months to be turned over to Iraqi police and army control.

A man blew up his car at an Iraqi police checkpoint north of Fallujah, killing three police officers and wounding two others, police said. A car bomb exploded in the town of Habania, killing one soldier and wounding three others, according to police.

Iraqi security forces were also targeted in the northern city of Mosul, where the U.S. military is still struggling to defeat forces from the mostly homegrown insurgent group known as al-Qaeda in Iraq.

Four residents died and 18 were injured when an improvised explosive device went off as an Iraqi police patrol passed, according to the U.S. military.

In the northern city of Kirkuk, an Iraqi journalist was killed Friday in a drive-by shooting in the center of the city, police said. The victim, Abaas Ahmed, worked for the independent news agency Ieen.

Gunmen also killed a lawyer for alleged Sunni insurgents, Weleed Salh Alazawee, in Baghdad's western neighborhood of Hurriyah on Friday morning, authorities said.

Special correspondents in Fallujah, Kirkuk and Mosul contributed to this report.