At least seven people have been killed after gunmen stormed the Pakistan Stock Exchange (PSX) in the southern city of Karachi, firing indiscriminately as they entered the building complex, rescue officials say.

Axar.az reports citing foreign media that four attackers stormed the building at 10 am (05:00 GMT) Monday morning as trading began, carrying hand grenades and firing automatic rifles.

All four attackers had been killed by police and security forces responding to the attack, said Faisal Edhi, head of the Edhi charity and ambulance service which serves the city.

The dead include the four attackers, a policeman and two civilians, said Edhi. Seven others had also been wounded in the attack, he said.