NEW : Pakistani Taliban takes credit for attack . Sources : Army spokesman : " The operation was carried out by the Pakistan Taliban, who are fighting against our forces in Afghanistan. 17 suspected militants died , others escape after long battle , spokesman says . Pakistani Taliban says it 's joining forces with fellow militant group Lashkar-i-Islam .
NEW : Pakistani Taliban takes credit for attack . Army spokesman : " The operation was carried out by the Pakistan Taliban, who are fighting against our forces in Afghanistan. 17 suspected militants died , others escape after long battle , spokesman says . Pakistani Taliban says it 's joining forces with fellow militant group Lashkar-i-Islam .