British Formula 1 driver Jenson Button has spoken of his "shock" and "sadness" at the news a race marshal was killed during the closing stages of the Canadian Formula 1 Grand Prix.
Shocked & saddened by the news that a marshal who is there to keep us safe has lost his life during our race today. Rest in peace my friend
The Federation Internationale de l'Automobile (FIA) confirmed the worker was killed at the circuit in Montreal after helping to move Esteban Gutiérrez's damaged car.
The marshal reportedly attempted to retrieve the radio he had dropped and fell under the wheels of a mobile crane. He was later transferred to the Sacre-Coeur hospital but died as a result of his injuries