This is the horrifying moment a lioness reared up and mauled to death an American tourist after she stopped to take a photograph in a South African safari park.

Standing on its hind legs, the lioness is seen peering into the vehicle seconds before it attacked Katherine Chappell, an editor on hit TV show Game of Thrones, through the open window.

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Engineer Ben Govender, 38, who was in the car behind Miss Chappell, said ‘no one could have imagined’ what would happen in the minutes after he took the extraordinary photograph.

He described the ‘terrifying’ scene as he watched the animal take its first bite out of the passenger on the back seat before retreating from the vehicle, blood dripping from its mouth and paw.

Credit: Daily Mail