Police officials say the deadliest among Wednesday's attacks was in the town of Khalis, where a suicide bomber struck a group of Iraqi Shiite pilgrims, killing six and wounding 16. Khalis is about 80 kilometers (50 miles) north of Baghdad.
Outside the city of Samarra, 95 kilometers (60 miles) north of Baghdad, gunmen opened fire on a bus carrying Pakistani Shiite pilgrims, killing three Pakistanis and wounding 12, along with two Iraqis- the group's driver and the translator.
At a checkpoint in the western city of Ramadi, a suicide car bomber killed two policemen and wounded five. All officials spoke on condition of anonymity because they were not authorized to talk to media.