At least 52 people have died after a fire broke out in a block of flats in Johannesburg, South African authorities say.

More than 40 others are injured.

Johannesburg authorities say it's unclear what sparked the blaze at the five-storey building in the city centre.

A spokesman for the emergency services, Robert Mulaudzi, told the BBC that firefighters had been able to bring out some of the occupants.

He said the fire had gutted the building, and that the search for other victims was continuing.

A video posted to the platform X, formerly known as Twitter, by Mr Mulaudzi showed fire trucks and ambulances outside the building with burnt out windows.