Car bombs across Iraq have killed 20 people and wounded dozens more.
The seven blasts Sunday targeted mainly Shi'ite areas south of Baghdad.
Police say one of the deadliest attacks targeted an industrial area in the central city of Kut, killing at least five people.
Twin bombings in the southern city of Basra killed five people, while car bombs in Nasiriyah and Mahmoudiya killed three others.
No group has claimed responsibility for the attacks.
Violence in Iraq has escalated in recent weeks, raising concern of a return to widespread sectarian attacks. Officials have blamed recent violence on Sunni Islamist insurgents.