Sunni politicians said looting raged out of control in Tikrit on Friday, hours after Iraq's prime minister called on security forces to arrest anyone breaking the law after the city had been wrested back from Islamic State militants.

The rampage of theft and burning began on Wednesday, within hours of the Iraqi government declaring that security forces and Shiite paramilitary forces had retaken the Sunni Muslim city, which the Islamic State group captured in June.

Sunni lawmakers blamed rogue security forces and members of the Shiite paramilitary groups for the chaos.