A suicide car bomb killed and wounded dozens of people near the town of Tal Afar in northern Iraq.
A police source said the attack took place on the road between Tal Afar and the city of Mosul on Friday.
Another police source in Mosul said the bombing had targeted an Iraqi army checkpoint.
On Wednesday, a suicide bomber killed nine people when he walked into a police station in Balad Ruz in Diyala.