At least 73 people have been killed in a fire in a multi-storey building in South Africa

At least 73 people have died - including seven children - in a Johannesburg building fire.

More than 50 others were injured.

Officials say it is unclear what sparked the blaze at the city centre five-storey building, which had been abandoned but was being occupied by homeless people.

South African President Cyril Ramaphosa described the incident as "a great tragedy, felt by families whose loved ones perished in this terrible manner".