Nelson Mandela's great-granddaughter has been killed in a car crash after a concert on the eve of the World Cup.
Zenani Mandela, 13, died when travelling home after the concert in Soweto, the Nelson Mandela Foundation said. No-one else was hurt.
Zenani was one of Mr Mandela's nine great-grandchildren.
The incident came just hours before the former South African president was due to attend the opening of the World Cup in Johannesburg.
Early reports quoted police as saying Zenani had been travelling with Nelson Mandela's former wife, Winnie Madikizela, when the accident happened near Johannesburg city centre.
But the Foundation told the BBC Winnie Madikizela was not in the car, which was the only vehicle involved in the crash at around 0030 (2230 GMT on Thursday).
"The family has asked for privacy as they mourn this tragedy," said the Foundation in a statement.
Zenani had celebrated her 13th birthday on 9 June.
Heavy traffic
The car overturned as it came off a slip road on the M1 motorway, which travels through Johannesburg city centre, says the BBC's Karen Allen in the city.
The car's driver has been arrested and police said they were investigating charges of culpable homicide, our correspondent adds.
Thursday's World Cup concert had drawn tens of thousands to Soweto's Orlando Stadium, and traffic in the area had been busy into the early hours of Friday.
The event featured a cast of international stars - including Colombian singer Shakira, the Black Eyed Peas and Alicia Keys, as well as African stars Amadou & Mariam and Hugh Masekela.
Anti-apartheid icon Mr Mandela, 91, had campaigned for the World Cup to come to South Africa.
Some 350,000 people are expected to visit South Africa for the competition, which is being held in Africa for the first time.