Four or five bombs fell on the Midan district of Baghdad's old town.
This is the latest in a spate of such attacks across the capital.
Elsewhere in Baghdad, at least two people were killed when a suicide bomber blew himself up on a bus traveling through a mainly Shi'te neighborhood, Al-Sadr City. Another 12 were wounded in the attack.
The attacks came hours before the release of a U.S. bipartisan report expected to call for the United States to change its policy in Iraq.
(Reuters, AFP, AP)