At least 17 people were killed and dozens wounded in bombings and shootings in northern Iraq and Baghdad on Sunday, police and medical sources said.

In the deadliest attack, gunmen killed three policemen and four detainees traveling in a police convoy near the northern city of Baiji.

The police had carried out 65 arrests in the town of Siniya, near Baiji, and was returning south to its base in Tikrit when gunmen ambushed them with a roadside bomb and sprayed gunfire, police said.