A powerful bomb blast ripped through a seminary in northwest Pakistan’s Peshawar city on Tuesday, killing at least seven children and wounding 70 others, senior police officials said. The blast occurred at the seminary in Dir Colony in interior Peshawar city after Fajr (morning) prayers. A bag filled with explosive materials was kept close to wall of the seminary by some unknown person which went off, killing 7 children and injuring 70 others