The Chehlum is an observance that occurs 40 days after Ashura and is marked by processions. The government suspended mobile services in 56 cities to ensure tightened security, but that did not stop two explosions going off in Mansehra.
The first one injured four people while the next one on Chakrali Road killed three near a school. Earlier, in Karachi, blasts in Orangi Town took four lives and injuring 21.
In Rawalpindi, a clash broke out between a group of protesters and security personnel the Pirwadhai area, which borders Islamabad.
Five people were injured in a firing incident in Raja Bazaar area of Rawalpindi, too.
A heavy contingent of security officers was present in the area when unidentified armed men opened fire. It was reported that processionists in Rawalpindi tried to enter Islamabad but the police stopped them, which led to clashes.