One attack occurred when a car bomb detonated while the convoy of Lt. Col. Dawood al-Sahan was leaving the police station in Shirqat, north of the Salahudin provincial capital of Tikrit, China's state-run news agency Xinhua reported.
Police said two suicide bombers blew themselves up, injuring 11 civilians and three police officers. Sahan was unharmed.
A car bomb also exploded at a police checkpoint outside the police academy in Tikrit, wounding four civilians and three policemen, the police official said.
The official said the bombing occurred near a recruitment center where dozens of recruits were gathering.