Islamabad, Oct 15 : At least three people were killed and four others injured after a bomb blast hit a vehicle in the Mastung district of Pakistan's southwestern Balochistan province, a local official said. The blast tookplace on Friday evening, Xinhua news agency reported. Deputy Commissioner of Mastung district Sultan Bugti told the media that a roadside bomb blast hit a vehicle of a local tribal elder in the Qabu area of the district. The vehicle was attacked when it was shifting the body of a person who was shot dead by unknown gunmen earlier on Friday. Security forces and rescue teams rushed to the site, and brought the bodies and injured to a hospital. The official added that the bomb was planted on the roadside and was detonated by a remote-controlled device. No group or individual has claimed the attack yet. /IANS