Islamabad: Karachi was tense on Tuesday following the killing of an MQM activist. Fourteen vehicles were set ablaze in different parts of this port city, a media report said.

Muttahida Quami Movement activist Mansoor Mukhtar was gunned down in PIB colony area early Tuesday, as reported. The news of the activist's killing spread like wildfire and sparked a string of arson incidents. Fourteen vehicles were torched in different areas and tyres were set on fire at Jamshed Road where shop owners were forced to shut their establishment.

There were also reports of firing in the air. An official of the Petroleum Dealers Association said all fuel stations would remain closed after an oil tanker was set on fire in Korangi. A traders association announced that business would remain closed due to tension.