Two suspected suicide car bombs have exploded in the Iraqi city of Falluja killing at least 15 people and injuring dozens more, police have said.
The attacks targeted two police positions, both of which were badly damaged in the blasts, officials said.
Falluja is in the western province of Anbar, which was the centre of a Sunni-led rebellion against US forces after the 2003 invasion.
The US military said the blasts took place shortly before noon (0900 GMT).
The bombers attacked police centres in the western neighbourhood of Golan and the eastern area of Shurta within minutes of each other, a security official told the AFP news agency.
The explosions happened outside concrete barriers protecting the two police posts, reports say.
A senior police officer told the Associated Press that one of the police posts had been levelled and several nearby houses badly damaged.
Correspondents described seeing bodies strewn across the ground.
Security forces are said to have imposed a curfew in both areas.
Falluja, 40 miles (64km) west of Baghdad, is largely sealed off by checkpoints. It has been relatively peaceful in recent months although attacks have continued.
Meanwhile, two US soldiers died and at least nine Iraqis were wounded in a suicide car bomb attack in the northern city of Mosul, a US military spokesman said.
Lt Col Dave Doherty said the attack took place near a checkpoint.
The attacks came as Iraq's Presidential Council gave the final approval to a landmark security pact with the US.
The Status of Forces Agreement has already been passed by the Iraqi cabinet and parliament.
Under the terms of the deal, US troops will withdraw from the streets of Iraqi towns and cities next year, with all 150,000 having left Iraq by the end of 2011.
White House spokeswoman Dana Perino welcomed Iraq's final approval of the deal, describing the agreement as "a remarkable achievement for both of our countries".