Formula 1 reserve racing driver Maria De Villota has been found dead in a hotel room in Seville, Spain.
A police spokeswoman said: "We are assuming it was a natural death, but we cannot confirm anything."
Spaniard De Villota, 33, lost her right eye in a crash last July while testing for the Marussia team.
She suffered severe head and facial injuries after colliding with a lorry at Duxford Aerodrome, (external) Cambridgeshire, but had been cleared to resume driving.
A statement from her family said: "Dear friends: Maria is gone. She had to go to heaven with all of the angels. Give thanks to God for the year-and-a-half we had left together."