People gather at the site of an explosion outside an election office of a candidate in Peshawar, Pakistan, on Sunday, April 28, 2013. The Pakistani Taliban detonated bombs at the campaign offices of two politicians in the country's northwest, police said, killing many people in an escalation of attacks on secular, left-leaning political parties. (AP Photo/Mohammad Sajjad)

Photo by: Mohammad Sajjad

People gather at the site of an explosion outside an election office of a candidate in Peshawar, Pakistan, on Sunday, April 28, 2013. The Pakistani Taliban detonated bombs at the campaign offices of two politicians in the country's northwest, police said, killing many people in an escalation of attacks on secular, left-leaning political parties. (AP Photo/Mohammad Sajjad)