Iraqi security forces are reported on increased alert following a series of bombs and other attacks that killed more than 100 people and wounded around 350 others on May 10.
The attacks marked what is reported to have been the bloodiest single day in Iraq so far this year.
The deadliest incident occurred in the city of Hilla, where a textile factory was hit by at least three car bomb strikes, killing at least 45 people.
The United States has led international condemnation of the violence, with the U.S. State Department saying it does not believe the attacks will be able to "undermine the confidence the Iraqi people have demonstrated in their government and their security forces."
State Department spokesman Philip Crowley said the latest attacks in Iraq "will not undermine the confidence the Iraqi people have demonstrated in their government and their security forces."
compiled from agency reports