Iraq's parliament has convened in a special session to condemn Thursday's deadly bombing inside the building, but few lawmakers attended.
Friday's session was broadcast live on Iraqi television.
Meanwhile, U.S. and Iraqi officials are investigating how an attacker penetrated the heavy security around Baghdad's green zone and detonated a bomb inside a cafeteria in the parliament building.
The U.S. military has revised the casualty figures from the attack, saying one person is confirmed dead and 22 others wounded. Initially, the military and Iraqi officials said eight people were killed, including at least two lawmakers.
U.S. and British officials called the attack the work of extremists who oppose Iraq's democracy. Democrats in Washington called the bombing an indication that the war is going badly.
Separately, the U.S. military said coalition forces captured 14 suspected al-Qaida linked terrorists during operations across the country Friday.
A statement said the operations were carried out in Baghdad, the northern city of Mosul and the towns of Karmah and Amiriyah.
In Baghdad Thursday, at least eight people were killed and 22 wounded when a suicide truck bomber blew himself up on a key bridge over the Tigris River.
The blast collapsed the steel structure and sent cars plunging into the river during the morning rush hour.
Some information for this report was provided by AP and AFP