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.

Later, in the ongoing violence, three more people were killed in gunfire at different parts of the city

Transport was suspended and most petrol stations were closed in fear of attacks and arson.

MQM has announced a period of mourning over the killing of their party member.

Deborah Lutterbeck, Reuters.