Two people were killed as “terrorists” lobbed hand grenades and sprayed bullets in an attack on a heavily-guarded stock exchange building.
All four assailants were killed by security forces soon after the attack began, according to media.
A police officer was among those wounded.
The attackers pulled up in a Toyota Corolla and then launched their attack on the Pakistan Stock Exchange building in the financial district of Karachi.
The building is in a high security zone and also houses the head offices of many private banks.
“Four attackers have been killed, they had come in a silver Corolla car,” Karachi police chief Ghulam Nabi Memon told Reuters
It was not immediately clear if there are more assailants at large.
There was no immediate claim of responsibility.
The stock exchange continued to operate and was up about 100 points following the attack.
“The situation is still unfolding and management, with the help of security forces, is managing the security and controlling the situation,” the Pakistan Stock Exchange (PSX) said on Twitter.
Pakistan has long been plagued by Islamist militant violence but attacks have become less frequent in recent years.
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