(CNN) — Iraqi authorities on Sunday closed all entrances into Ramadi and imposed a curfew after a series of car bombings killed at least 23 people and injured 77 others, according to Interior Ministry officials.
Another person died in the city of Mahmoudiya on Sunday.
Authorities believe the coordinated attacks in Ramadi were carried out by al Qaeda in Iraq, a Sunni militant group.
Two of the car bombs detonated within 10 minutes of each other at Ramadi’s police headquarters, killing at least eight police officers, the officials said.
Less than an hour later, a third car bomb, driven by a suicide attacker, detonated outside a hospital.