The attacks are mostly orchestrated by Sunni extremist militant groups, although some have also been claimed by the Pakistani Taliban.
MORE: http://www.nytimes.com/2013/09/23/world/asia/pakistan-church-bombing.html?partner=rssnyt&emc=rss&_r=2&
See also...
Suicide bombers kill 81 at church in Peshawar, Pakistan
http://www.cnn.com/2013/09/22/world/asia/pakistan-attack/index.html
Bus blast in Pakistan kills at least 17
http://www.cnn.com/2013/09/27/world/asia/pakistan-violence/index.html
Taliban bomb kills top Pakistani general, officers
http://www.cnn.com/2013/09/15/world/asia/pakistan-swat-taliban-attack/index.html
