South African tycoon accused of bribery killed in car crash

Gavin Watson was at the centre of claims of systematic graft involving leading ANC figures

Opposition politicians in South Africa are calling for a "thorough and transparent" investigation into a car crash that killed a controversial South African businessman accused of bribing dozens of top government officials.

Gavin Watson, 71, died when his Toyota Corolla hit a concrete bridge support in Johannesburg in the early hours of Monday morning as he was travelling alone to the city's international airport.