A suspected suicide bomber has killed at least seven Iraqi police and wounded 30 others near Baghdad, police say.
Iraq's police are a regular target for insurgent attacks
The bomber struck at a police station in the town of Muqdadiya, in the province of Diyala.
Police sources said the bomber walked into the police station compound, destroying much of the building when he detonated his explosives.
Iraq's police are a frequent target for attacks, and are widely thought to have been infiltrated by insurgents.
Escalating violence in Iraq has prompted the US to re-examine its military policy in the country.
Iraq's government, which is struggling to contain insurgent violence, also said five police were killed in fighting in Samawah in the south of the country, the Associated Press reported.
The latest violence came after the US said one soldier was killed in a roadside bomb attack to the south-east of Baghdad on Saturday.