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Lewis Hamilton was in the middle of a live television interview when he witnessed fellow driver, Anthoine Hubert's, fatal crash.
The Formula One champion was being interviewed at the Belgian Grand Prix the moment the tragic collision happened on Saturday.
Shaken by the devastating incident, the F1 driver can be heard telling the interviewer: "Oh wow. Hope that kid's good. Wow. That's terrifying."
Hubert, 22, hit the barrier at Spa, where he was racing in a Formula Two race.
A car being driven by Juan Manuel Correa then hit Hubert's vehicle at around 150mph. Correa was taken to hospital after sustaining two broken legs and a damaged spine.
The young driver was confirmed dead by the Federation International de l'Automobile (FIA) later that night.
The statement read: "The Federation Internationale de l'Automobile (FIA) regrets to advise that a serious incident involving cars 12, 19 and 20 occurred at 17:07 on 31/08/19 as a part of the FIA Formula 2 Feature Race at Spa-Francorchamps, round 17 of the season.
"The scene was immediately attended by emergency and medical crews, and all drivers were taken to the medical centre.
"As a result of the incident, the FIA regrets to inform that the driver of car #19, Anthoine Hubert, succumbed to his injuries, and passed away at 18:35."
And following news of his death, five-time champion Hamilton led the tributes to Frenchman.
Posting to his Instagram account, the Brit wrote: "This is devastating. God rest your soul Anthoine. My prayers and thoughts are with you and your family today."
Ahead of yesterday's F1 race, drivers wore black armbands in memory of Hubert and held a minute's silence, with the driver's mum and brother in attendance.
Charles Leclerc, who topped the podium for the first time in his F1 career, dedicated the victory to his childhood friend.
He said: "On the one hand, I have a dream since I was a child that has been realised, and on the other hand, it has been very difficult.
"We have lost a friend first of all, and it's very difficult in these situations so I would like to dedicate this win to him.
"We have grown up together and my first ever race I did when I was seven with Anthoine, so it's such a shame what happened.
"I can't fully enjoy my first victory but it is a memory that will live with me forever."
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