The attacks shattered a relative lull in violence
Three blasts have rocked the Iraqi city of Ramadi, west of Baghdad, killing at least 22 people and wounding 61, police have told the BBC.
A car packed with explosives ploughed into a concrete wall at the police headquarters. A motorcycle bomb then went off among the crowd that gathered.
The third blast, an apparent car bomb, went off outside the main hospital.
A curfew has been imposed in Ramadi, capital of Anbar province, which was once a centre of the Sunni insurgency.
Eyewitness Musaab Ali Mohammed said he was buying cigarettes near the police headquarters when he heard a big explosion.
"I saw police cars and firefighters, and they started to carry out the wounded and dead. Minutes later, a second explosion took place," he told the Associated Press news agency.
"After that, policemen started to fire in the air and called upon civilians to leave, fearing a third blast," the eyewitness added.
Anbar has been relatively stable since Sunni fighters turned against al-Qaeda and joined forces with the US and Iraqi security forces.
But recent weeks have seen a series of attacks on police and Iraqi army checkpoints in Anbar.
On Tuesday, a car bomb killed at least nine people in a market in Falluja. A day earlier, a suicide bomber killed six mourners at a funeral in Haditha.
The dead and injured in the latest attacks include both police and civilians.