Khyber Pakhtunkhwa is rife with Islamic extremists and has been the site of recent clashes between Pakistani security forces and militants.
MORE: http://www.cnn.com/2012/09/16/world/asia/pakistan-unrest/index.html?hpt=wo_c2
See also...
Blast kills at least 8, injures dozens at Pakistan market
http://www.cnn.com/2012/09/10/world/asia/pakistan-explosion/index.html
