Political unrest and sectarian violence between Sunnis and Shiites have festered in recent months.
MORE: http://www.cnn.com/2013/11/23/world/meast/iraq-twin-bombs/index.html
See also...
Explosions, shootings around Iraq kill 19
http://www.cnn.com/2013/11/25/world/meast/iraq-violence/index.html
Convulsions of violence in Iraq leave more than 20 dead, dozens wounded
http://www.cnn.com/2013/11/27/world/meast/iraq-violence/index.html
Iraq explosions and shootings kill 21
http://www.cnn.com/2013/11/23/world/meast/iraq-violence/index.html
Suicide bombing at outdoor market in Iraq; many casualties
http://www.cnn.com/2013/11/21/world/meast/iraq-violence/index.html
Dozens killed in Iraq violence
http://www.cnn.com/2013/11/20/world/meast/iraq-violence/index.html
14 dead in wave of Baghdad bombings
http://www.cnn.com/2013/11/17/world/meast/iraq-violence/index.html
36 killed in blasts targeting Iraqi Shiite Muslims on holy day
http://www.cnn.com/2013/11/14/world/meast/iraq-violence/index.html
Mayor gunned down, 24 others killed across Iraq
http://www.cnn.com/2013/11/13/world/meast/iraq-violence/index.html
