Four gunmen attacked the Pakistani stock exchange in Karachi, killing at least two people and wounding others before police shot them 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.
Source: BBC News