Four neutralised, five security forces and a civilian died, three injured.
Four heavily armed gunmen with ak-47 rifles and grenades, attempted to storm in Pakistan stock exchange.
The building is located in a high security zone in Karachi.
The gunmen got down from a car, lobbed a grenade in the main entrance and opened fire on the security forces.
Four security guards in the premises, one police official and a civilian were killed in the firing.
All the four gunmen were neutralised and their attempt to create hostage-situation foiled.