In Pakistan, at least twelve people have been killed, and 30 others injured, while a suicide bomber blew himself up in a crowded square, in the restive Swat valley. The official sources said that the attacker detonated his explosives, when a security forces van was passing though Nishat Chowk, a congested square in Mingora, the main city of Swat district. Seven persons were killed instantly, while five more succumbed to their injuries in hospitals.