KARACHI: In view of the terrorist attack on Pakistan Stock Exchange and possible targeting of other institutions, security has been beefed up at the Custom House Karachi.

On the directives of Chief Collector Enforcement Saifuddin Junejo, Additional Collector Preventive Umar Shafique has also sought assistance from security agencies. Meanhile, tight security arrangements have been made on the entry and exit points of the Custom House Karachi. No vehicles are being allowed on Nadirshah Eduljee Dinshaw road.

An official said the attack on stock exchanges was an India sponsored attack. The official said India had been isolated by all its neighbors including China, Pakistan, Nepal, Bangladesh and Bhutan, and this frustrated India adding these terrorist attacks are due to frustration of India.

Four gunmen attacked the Pakistani stock exchange in Karachi, killing two guards and a policeman and wounding seven others before being shot dead.

The assailants launched a grenade attack at the main gate to the building and opened fire but police say they failed to make it to the trading floor.

Staff inside took refuge in locked rooms and many were evacuated. Security forces are searching the area.

Militants from the Baloch Liberation Army say they were behind the attack.

 Pakistan has suffered years of militant violence, but attacks such as this one have become rare in recent years.