Iraqi officials say violence in and near Baghdad has killed at least three policemen and a government worker.
Police say a car bomb blast hit a police checkpoint Sunday in the town of Karmah, killing the officers, including a lieutenant colonel, and wounding at least three other people.
Authorities also say gunmen killed an anti-corruption government employee on the main road to Baghdad airport. The highway was considered one of the world's deadliest during the height of Iraq's insurgency in 2006 and 2007.
Insurgents have increasingly targeted Iraqi police and government employees in recent months.
Some information for this report was provided by AP, AFP and Reuters.