Police said they believe al Qaeda in Iraq was behind the attack.
MORE: http://www.cnn.com/2012/06/18/world/meast/iraq-funeral-bombing/index.html?hpt=imi_c2
See also...
Suicide bomber targets NATO, Afghan forces; up to 18 believed killed
http://www.cnn.com/2012/06/20/world/asia/afghanistan-violence/index.html?hpt=wo_c2
Uniformed attackers strike 3 times in Afghanistan, U.S. says
http://www.cnn.com/2012/06/19/world/asia/afghanistan-violence/index.html?hpt=ias_c2
