Iraqi officials say a shooting and two car bombs have killed four people and wounded 26 in the western and northern parts of the country.
Police officials say the deadliest attack took place on Wednesday morning when gunmen sprayed a police checkpoint with bullets in the western city of Fallujah, killing three policemen.
In the oil-rich city of Kirkuk, police say a car bomb exploded near the offices of a Kurdish party, wounding 20 people.
A suicide car bomber hit a checkpoint manned by Kurdish security forces, killing one Kurdish security member and wounding six others.
Hospital officials confirmed the casualty figures.
All officials spoke on condition of anonymity because they are not authorised to speak to the media. Violence has ebbed in Iraq, but insurgent attacks are still frequent.