Eight policemen, including an officer, were killed while five were wounded in the attack, he said.
Later in the morning, several bombings hit different parts of Baghdad and northern Iraq, killing 30 people and wounding 73, police said.
The deadliest of the attacks in the Iraqi capital was in the southeastern Bayaa neighborhood, where a parked car bomb ripped through a parking lot, killing six civilians and wounding 12.
Another parked car bomb went off in the central Salhia neighborhood near the heavily fortified Green Zone where key government offices and foreign embassies are located.
That attack killed five civilians and wounded 14.
