Former Top Gear host Richard Hammond has been airlifted to hospital after his car crashed and burst into flames while filming in the Swiss alps.
The British TV presenter, 47, was driving an electric super car, and his colleague Jeremy Clarkson described it as "the biggest crash I've ever seen and the most frightening".
Hammond who was filming for The Grand Tour, escaped the crash, which left the vehicle on its roof and scorched, with no serious injuries.
A spokesman for The Grand Tour said he suffered no serious injury.
"Richard was conscious and talking, and climbed out of the car himself before the vehicle burst into flames.
"He was flown by Air Ambulance to hospital in St Gallen to be checked over, revealing a fracture to his knee.
"Nobody else was in the car or involved in the accident, and we'd like to thank the paramedics on site for their swift response.
"The cause of the crash is unknown and is being investigated."
Clarkson tweeted: "It was the biggest crash I've ever seen and the most frightening but incredibly, and thankfully, Richard seems to be mostly OK."
A statement from the organisers of the Bergrennen, said: "On Saturday, an accident took place at the Bergrennen Hemberg in a demonstration run between the training courses.
"The vehicle left the track and landed in the meadow."
They added that rescuers were "very fast" to reach the scene.
"The fire brigade extinguished the burning car quickly," they said.
It comes 11 years after Hammond suffered life-threatening head injuries following a high-speed crash as he filmed for BBC's Top Gear in 2006.
The presenter was in a coma for two weeks following the 288mph accident, but made a full recovery.
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