The first explosion occurred in a parking lot in Ramadi, when a parked car exploded near the police headquarters for Anbar province and the provincial council building, said a local police official.
As police and bystanders rushed to the scene, a second car parked in the vicinity blew up, said the police official. According to the official, a third vehicle exploded about an hour later near the gates to the Ramadi hospital.
Multiple explosions timed to kill rescuers and security forces responding to an earlier bomb were a hallmark of Al Qaeda in Iraq forces during the height of the insurgency.
One bystander, Musaab Ali Mohammed, said he was buying cigarettes from a shop near the police headquarters when he heard a big explosion and saw smoke billowing out from the parking lot.
"I saw police cars and firefighters, and they started to carry out the wounded and dead. ... Minutes later, a second explosion took place," he said, adding that many of the injured in the second blast appeared to be firefighters. "After that, policemen started to fire in the air and called upon civilians to leave, fearing a third blast."
The police and hospital official both spoke on condition of anonymity because they were not authorized to talk to the media.