A car bomb killed 22 people and wounded 40 on Thursday at an intersection in Baghdad where minibuses pick up and drop off passengers, Iraqi police said.
They said the explosion took place in the mainly Shi'ite district of Bayaa, in southwestern Baghdad. The area has been a frequent target of bomb attacks.
Police said around 40 vehicles had been set ablaze by the bomb, which went off during the morning rush hour.
Mortar bombs also slammed into the commercial area of Shorja in central Baghdad, killing at least two people and wounding 14, police said.
US and Iraqi officials blame Sunni Islamist al Qaeda for most of the car bombings in Iraq.
Tens of thousands of US and Iraqi troops are engaged in an offensive against Al -Qaeda in an attempt to take down the group's car bomb networks.
US officials accuse Al-Qaeda of trying to tip Iraq into full-scale sectarian civil war between majority Shi'ites and minority Sunni Arabs.