One sub-inspector and three security guards were killed in a gun and grenade attack at the Pakistan Stock Exchange in Karachi on Monday, local media reported. 

All four militants have been killed by the police. The surrounding areas have been sealed off.

The injured people have been shifted to Civil Hospital Karachi where two of them are reportedly in critical condition.

The separatist group Balochistan Liberation Army (BLA) later claimed responsibility for the attack. 

Business continued as usual at the Karachi stock exchange after the attack, AFP reported. 

(Cover: The site of an attack at the entrance of the Pakistan Stock Exchange in Karachi, June 29, 2020. /Reuters)