More attacks have rocked Iraq, which is experiencing its worst sectarian violence since U.S. troops withdrew in December 2011.
More Attacks Across Iraq

1
Onlookers gather outside Zain al-Abideen mosque, a Shi'ite place of worship, near where a suicide bomb attack occurred, Hilla, Iraq, May 21, 2013.

2
An Iraqi woman passes by the scene of a car bomb attack in Kamaliyah, a predominantly Shi'ite area of eastern Baghdad, May 20, 2013.

3
Mourners stand beside coffins of four members of a family killed in Basra bomb attacks, during a funeral in Najaf, Iraq, May 20, 2013.

4
Relatives carry the coffin of an Iraqi police officer killed by militants, Najaf, Iraq, May 20, 2013.