Attackers shot dead at least 10 people in a strike on government targets in the northern Iraqi city of Hawija on Wednesday, police said.
Gunmen attacked City Council offices and a nearby police station with two car bombs and several mortar rounds.
They gunned down 10 employees when they stormed the City Council building. Security forces later clashed with the attackers, and at least three police officers were wounded.
Iraq has been beset with Sunni-Shiite frictions over the years. The tensions began escalating after an April incident in Hawija. That's when Iraqi security forces raided a site used by Sunni protesters to demonstrate against the Shiite-led government.