Up to 30 people were killed in an suicide attack on a police headquarters in Iraq when militants dressed in police uniform detonated a car bomb and then tried to storm the compound.

The car was also disguised as a police vehicle and the rush hour explosion was quickly followed by an assault from at least three gunmen armed with hand grenades and suicide vests.

The attackers threw several grenades as they burst through the main gate of the Kirkuk police compound, but were shot dead before they could reach the headquarters building.