Baghdad: At least six people were killed and over 50 injured in an attack on the US-run Camp Bucca military prison in southern Iraq on Saturday.
A statement from the military said no US service members were killed or injured, but no further information was immediately available.
The US military oversees more than 20,000 inmates at Camp Bucca and Camp Cropper, near the Baghdad airport.
Military officials refuse to give a breakdown of how many prisoners are at each facility but say the majority are at Camp Bucca.
Camp Bucca was referred to in internet posting, apparently from the group Islamic State of Iraq, last month.
The posting implied the group had captured three US soldiers in revenge for "the killings, the displacement, the detentions, the prisons of Abu Ghraib and Bucca."
The group is a Sunni insurgent coalition that includes Al Qaida in Iraq.
In the Shaab neighborhood, north of Baghdad, two people were killed and 12 others were wounded when a car bomb exploded near policemen, an Interior Ministry official said.
In another attack, gunmen killed one Iraqi police officer and wounded another, the official said.
In the Adhamiyah district, a car bomb detonated near an Iraqi police patrol, killing two policemen. Violence elsewhere in the capital and rest of the country killed 24 people.
At a checkpoint south of Baghdad, a truck loaded with explosives struck an Iraqi army post, killing at least 12 people and wounding 30 others, a Hilla police official said.
A roadside bomb struck a minibus in Baghdad's Baladiyat district, killing seven people and wounding 12.