At least 31 people have been killed and more than 200 others wounded in a series of early-morning explosions in cities across Iraq, officials say.
Attacks were reported in Baghdad, as well as Tuz Khurmatu and Kirkuk in the north and Nasariyah in the south.
The co-ordinated attacks occurred during the morning rush hour and mainly involved car bombs.
The violence comes ahead of Iraq's provincial elections on 20 April, the first in the country since 2010.
Monday's attacks were particularly broad in scope, with several cities hit, including Fallujah, Tikrit, Samarra and Hilla.
The explosions were caused by 20 cars packed with explosives and three roadside bombs, AFP news agency reported.
Three car bombs went off minutes apart in Tuz Khurmatu, killing six people and wounding more than 60, AFP said.
Although violence has decreased in Iraq since the peak of the insurgency in 2006 and 2007, bombings are still common.