Officials in Iraq say militants have attacked a police station in a village north of Baghdad, killing nine people.

A police officer says the attack at dawn Sunday started with a suicide car bombing in the village of al-Salman outside the town of Tarmiyah, followed by an assault by armed militants.

He said the attack killed five police officers and four civilians and wounded 11 people. Tarmiyah is about 50 kilometers (30 miles) north of Baghdad.

Two medical officials confirmed the causality figures. All officials spoke on condition of anonymity as they were not authorized to release the information.

No group immediately claimed responsibility for the attack. Iraqi forces, backed by U.S.-led airstrikes, are fighting the extremist Islamic State group, which now controls about a third of the country.