LONDON -- A stuntman who wowed crowds with his portrayal of James Bond during the London 2012 Olympic Opening Ceremony has been killed in a wing-diving accident.

Mark Sutton, 42, crashed into a mountain ridge in the Swiss Alps, near Martigny, which is close to the French border.

Swiss police said that one of two wing-divers who jumped out of a helicopter at a height of more than 10,000 feet hit the ridge on Wednesday morning.

"He was part of a group of about 20 other comrades in Chamonix which are regarded to be among the best in the world," police said in a statement.

Formal identification will take place using a DNA test, officials added.

Trey Cook, the editor-in-chief for Epic TV, which organized the Swiss event, said the tight-knit wing-diving community was devastated by the accident.

"Mark was a very experienced pilot," he said. "Conditions were good yesterday and people had been flying extremely conservatively in the practice flights, but unfortunately this is a sport where there is very little margin for error."

Millions of people watched the former British army officer as he parachuted towards London's Olympic Stadium dressed as James Bond, alongside stuntman Gary Connery, who was dressed as Queen Elizabeth II.

In a pre-recorded segment filmed at Buckingham Palace, Britain's queen greeted 007 star Daniel Craig with the words: "Good evening, Mr Bond" before the pair then walked towards a helicopter.

Moments later the stuntmen dived out of the helicopter over London's Olympic Park in costume, giving the effect that Craig and the monarch had leaped from the craft.

Wing-suit flying involves flying through the air in a specially designed device that adds surface area to the human body, enabling a significant increase in lift.

Sometimes referred too as "birdman" and "flying squirrel" suits, fabric is placed under the arms and between the legs, allowing users to simulate flying.

A flight normally ends with a parachute opening.