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. The car's driver has been arrested and charged with drink-driving, police say. The incident came just hours before the former South African president was due to attend the opening of the World Cup in Johannesburg. But the Foundation said the death of one of his nine great-grandchildren meant it was uncertain whether he would attend.