Iraqi officials say attacks in Baghdad and in the north of the country have killed more than 20 people.
Two car bombs and a roadside bomb went off in Baghdad and its outskirts, killing nine people and wounding 22.
A car bomb killed five people near the town of Balad, some 80 kilometers north of Baghdad.
Gunmen opened fire on a van ferrying soldiers from Baghdad to Mosul, the capital of northern Nineveh Province, killing five of them.
Also in Nineveh, three separate attacks by gunmen left a soldier and two civilians dead, including a member of the Shabak minority, which mostly lives near Iraq's border with Turkey.
Observers say the sharp rise in violence in Iraq this year is linked to anger among Sunni Arabs at their alleged mistreatment by Shi'a-led authorities.
Based on reporting by AFP and AP