Eleven people were killed on Monday morning when a suicide car bomber struck outside an Iraqi prison, north of the capital, Baghdad.
Among the dead were six policemen, while a further 20 others were wounded, including security guards, prison staff and police officers, Al Jazeera reported.
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The attack took place at about 8am local time in the town of Taji, 15 miles north of Baghdad - though it was unclear if it was part of a prison break-out attempt, the BBC reported.
It is understood that many employees of the al-Hout prison were arriving at work when the car bomb detonated at the main entrance to the prison.
The bombing comes after a series of explosions hit a Baghdad market last Saturday, killing at least 15 people, Al Jazeera reported.
It also comes three days after 19 people, including army and police officers, died in a triple bombing in the southern port city of Basra.
Militants attacks have led to security concerns in Iraq, where the withdrawal of US troops is due to be completed by the end of the year.