SULAIMANIYAH, Iraq — Three separate attacks against Shiite mosques in a volatile northern city have killed four civilians and injured 62 others, an Iraqi police commander said.

Kirkuk police commander Brig. Gen. Sarhad Qadir says Friday's attacks took place in different areas as worshipers were leaving the mosques.

Qadir said the deadliest attack killed four when a parked car bomb went off in Kirkuk's southern Domiz area. A second bomb exploded after police and rescuers rushed to the scene, wounding 24.

As in other Muslim countries, Friday sermons drew crowds of worshippers in Iraq.

Kirkuk, 180 miles north of Baghdad, is home to a combustible mix of Kurds, Sunni Arabs and Turkomen who all claim rights to the city and the oil-rich lands around it.