Seven civilians, three soldiers and four militants were killed in the violence in the town of Hawijah, west of Kirkuk, army Staff Major General Mohammed Khalaf al-Dulaimi said.
One suicide bomber detonated an explosives-rigged vehicle near a police station while a second blew up another near a local administrative building.
Militants then targeted those structures and a local council building with mortar fire, and gunmen attacked, leading to clashes with soldiers.
Soldiers were searching for the remaining militants, who left the area, Dulaimi said.
Iraq has seen a heightened level of violence since the beginning of the year that sharply worsened following an April 23 security forces operation against an anti-government protest site near Hawijah that sparked clashes in which dozens of people died.
Death tolls in Iraq have reached a level not seen since 2008, when the country was just emerging from a brutal sectarian conflict. (AFP)
