NEW : The Pakistani Taliban claims responsibility for the blast . The explosion happened outside a political rally . Score: The chief minister and provincial leaders from Khyber Pakhtunkhwa province , where the rally was held , attended the event , which was hosted by the Awami National Party . 6 The party is part of the governing coalition led by Gilani 's Pakistan Peoples Party .
NEW : The Pakistani Taliban claims responsibility for the blast . The explosion happened outside a political rally . Score: 6 The party is part of the governing coalition led by Gilani 's Pakistan Peoples Party .