Earlier blasts targeted a courthouse and passport office in central Baghdad

At least 22 people have been killed and 32 hurt by a female suicide bomber who blew herself up at a police gathering in Iraq's Diyala province, police say.

The guests were attending an Iftar banquet, when Muslims break their fast during the month of Ramadan, in Balad Ruz, 70km (45 miles) north of Baghdad.

Officials told the BBC the party was being held by a policeman to celebrate his recent release from US detention.

Earlier, two car bombs exploded in central Baghdad, killing 12 people.

The blasts were in the busy Karrada district, near a courthouse and passport office.

Security forces targeted

Local sources said a police officer was holding a large party to celebrate his release on Monday from a US-run detention centre, Camp Bucca, when the suicide bomber walked into his home.

Some of the wounded were taken to a joint US-Iraqi base nearby for treatment.

Suicide bombers have frequently targeted the Iraqi police force.

The BBC's Mike Sergeant in Baghdad says there have been fewer attacks across the country in recent months, but in Diyala province the level of violence is still relatively high.

There has also been an increase in attacks carried out by female suicide bombers, our correspondent says.

Earlier, US Defence Secretary Robert Gates said the challenge in Iraq was how to preserve and extend security gains at a time when the number of US troops there was falling.

Visiting Iraq for the eighth time in the past two years, Mr Gates said the US military's presence in Iraq was now a mission in transition, with more responsibility being passed to Iraqi forces.



