Zimbabwe prime minister Morgan Tsvangirai said in a statement he was "deeply saddened at the death of a footballing legend, Adam Ndlovu" in what he called a "horror crash".
He said: "My prayers are with the Ndlovu family, the football fraternity and the nation at this sad loss."
The brothers were travelling to Victoria Falls to take part in a charity match and were in Peter Ndlovu's SUV when it veered off the road around 12 miles from the famous waterfall.
More top news
The flame-haired royal is an accomplished polo player but that didn't stop him taking a tumble not once, but twice, during the game.
A 24-year-old man has been arrested on suspicion of murder after the body washed up on the Thames shoreline.
Police were called to an address in Carlisle on Friday night but the eight-month-old died later in hospital.