Bombs targeting Shiites south of Baghdad Thursday killed eight people and wounded 20 others.
Police and a medical officials said a car bomb exploded under a bridge in Karbala, killing five people and wounding 13.
According to police, security forces closed off all roads leading to Karbala and were searching for a second car bomb.
In Hilla, two roadside bombs targeted a group of Shiite pilgrims, killing three people and wounding seven others.