Iraqi officials say attacks across the country have killed more than 50 people, including 30 victims in a single bomb attack on Baghdad's Shi'ite Sadr City neighborhood.
The morning explosion struck a group of Shi'ite laborers who were waiting for work.
Meanwhile, US National Security Advisor Stephen Hadley is in Baghdad for talks on military and political cooperation. President Bush's chief security advisor arrived earlier on Monday and met with Iraq's prime minister and other top officials.
His visit comes as US troop deaths in October reached 100 -- the highest monthly total since January 2005.
Also Monday, British officials said they are moving civilian staff from the British consulate in Basra to a nearby airport because of safety concerns.
Officials blamed the move on recent mortar and rocket attacks on the compound.
The British consul-general will remain at the complex, while civilian staff will relocate to an airport outside Basra.