2,500 blasts strike a Sunni Muslim procession in 30-minute span . `` At the end of the procession , security should have been more vigilant , '' Pervez said . 7 people are wounded , with 218 in critical condition , officials say . 218 police officers were assigned to procession after attack warning .
2,500 blasts strike a Sunni Muslim procession in 30-minute span . 7 people are wounded , with 218 in critical condition , officials say . 218 police officers were assigned to procession after attack warning .