Pakistan stock exchange attacked by gunmen

Image Credit: Reuters
Four gunmen attacked the stock exchange in Karachi on Monday, when they started spraying bullets and hurling grenades. They arrived in a silver toyota corolla and they killed 2 security guards and a police officer.
All four terrorists were soon killed by security forces. The motive of the attack was still unknown, but Pakistan has a long history of Islamist militant violence.
The security forces stormed the building in case there were additional gunmen inside. All the staff hid inside their offices.
The director of the stock exchange, Abid Habib, said he was holed up with 20 more workers, while security forces were sweeping the building.