In Pakistan, at least 29 people have been killed and 30 others injured when a bus carrying some 60 people was attacked by four unknown gunmen near Mastung, in the southwest Balochistan province. According to the local media reports, the attack took place at about 5:30 p.m. local time today when a bus carrying some 60 Shia Muslims was attacked by four unknown gunmen on the way from Quetta to Iran for pilgrimage.The report said four unidentified gunmen stopped the bus near Mastung. They ordered all the passengers on board to get off and then fired at them indiscriminately. The attackers ran away after the firing. All the injured people have been shifted to hospitals in Mastung and Quetta. Hospital sources said that at least six of the injured people were in critical condition. Emergency has been declared in all hospitals in Quetta. No group has claimed responsibility for the attack yet.