And in the northern city of Mosul, a parked car bomb went off as a police patrol passed, killing two people and wounded two, police said. Another police patrol was hit by a roadside bomb in the town of Balad Ruz, 70 kilometers (45 miles) northeast of Baghdad, killing one policeman and wounding six others.
In other violence, a roadside bomb killed an Iraqi soldier and wounded five others in Taji, north of Baghdad, and a parked car bomb struck a restaurant in Madain, southeast of the capital, killing a civilian and wounding 12 others, according to police.
Five health officials confirmed the casualty figures. All the officials spoke on condition of anonymity because they weren't authorized to release the information.
The nationwide death toll was the highest since Oct. 27 when 40 people were killed in a string of bombings and other attacks around the country.
Although violence has ebbed since the peak of insurgency several years ago, attacks are still frequent against security forces, government officials and civilians. No one claimed responsibility for Thursday's bombings, but car bombs, shootings and roadside devices are the hallmark of al-Qaida in Iraq.
Associated Press writers Qassim Abdul-Zahra and Sameer N. Yacoub contributed to this report.