French authorities stepped up their search on Sunday for a Chinese hotel magnate and a French businessman who went missing after their helicopter crashed while they were celebrating the sale of a prestigious Bordeaux château and vineyard.
James Grégoire, a French entrepreneur, had taken Lam Kok, owner of Brilliant, a Hong-Kong based hotel chain, for a flight over the Château de la Riviere estate in his helicopter on Friday when it crashed into the Dordogne river.
Mr Kok, who also owns a specialist tea business, had just bought the 90 hectare estate – including 65 hectares of vineyard – and its large 16th century château from Mr Grégoire for a reported €30m.