Officials said the blast targeted a crowded outdoor market in the sprawling district in eastern Baghdad.
The latest death toll takes to 20 the number of people killed in violence in Baghdad on Tuesday.
Additionally, four bullet-riddled bodies, assumingly Sunnis, were discovered in a Shiite district.
The targeting of the Shiite district came as signs emerged of a reprisal sectarian slaughter of Sunnis in Iraq, as police said pro-government Shiite militiamen killed nearly four dozen detainees after insurgents tried to storm a jail northeast of Baghdad on Monday night.
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