Description:At least five people are killed in Karachi Tuesday after angry mobs torched more than two dozen vehicles hours after gunmen killed a political party activist. The governing Muttahida Qaumi Movement party said its local leader was shot dead in his house. His brother and sister-in-law were wounded in the attack, but the brother later died. Shortly after the killing, unidentified men took to the streets and started burning vehicles.(1:08)