An ambush which targeted a police patrol and members of the Iraqi Awakening Councils on Wednesday evening has claimed 28 lives, including 11 council members, medical sources told Deutsche Presse-Agentur dpa on Thursday.
The ambush targeted the police patrol on Wednesday evening near al-Dalimat village in Diyala province, 57 kilometres north-east of the Iraqi capital Baghdad.
Sources said that the attackers killed a policeman before opening fire on the patrol.
Police published a statement blaming al-Qaeda for the attack.
Two high-ranking officials were also among the dead.
The restive Diyala province has witnessed a military crackdown since July, aiming to stem militant violence in the province.
The Iraqi Awakening Councils are a loose associatio of Sunni leaders allied with US forces.