A car bomb has killed 11 people and wounded 36 others in the northern Iraqi town of Tal Afar, Iraqi police and the US military say.
The explosion, the latest in a series that have rocked the country in weeks, took place outside a car dealership on Saturday.
Tal Afar is in Iraq's volatile Nineveh province, where Sunni al-Qaeda fighters still operate despite several security crackdowns aimed at stamping them out.
The town lies halfway between the Syrian border and the city of Mosul, which the US military considers the last remaining urban bastion of al-Qaeda in Iraq.
A US statement said the car bomb was driven by a suicide bomber, but Iraqi police said the car was parked.
In Baghdad a car bomb exploded near the National Theatre, killing at least three people and wounding another 23, police said.
Another 10 people were wounded, including seven civilians, in two more bomb attacks in Baghdad, police said.
One targeted a police patrol and another set alight a mostly empty oil tanker.
In another roadside bomb attack outside the town of Fallujah - once the epicentre of the Sunni rebellion - six policemen, including one officer - were wounded, Jumaa Hussein Hamadi, a police captain, said.
In March 2007, the mostly Turkmen town of Tal Afar saw one of the deadliest single attacks in Iraq since the US-led invasion four years earlier when a suicide truck bomb killed more than 150 people.
Fighters have shown themselves still capable of carrying out large scale attacks across the country, but violence has been falling in recent months to its lowest level since the US-led invasion in 2003.