The MQM, which is one of Pakistan's largest and most liberal parties, has been targeted by the Pakistani Taliban in recent weeks. The party is firmly opposed to the Islamist militant group.
MORE: http://www.cnn.com/2013/05/04/world/asia/pakistan-explosions/index.html?hpt=ias_c2
See also...
Politician, Bhutto case prosecutor gunned down in Pakistan
http://www.cnn.com/2013/05/03/world/asia/pakistan-bhutto-prosecutor-killed/index.html
Gunmen kill political candidate in continued pre-election violence
http://www.cnn.com/2013/04/30/world/asia/pakistan-violence/index.html
