Alfa Romeo driver Zhou Guanyu's Alfa Romeo flipped upside down following a collision with Mercedes' George Russell at the start of the British Grand Prix.
Carlos Sainz was in pole position at Silverstone but had been overtaken by world champion Max Verstappen when the frightening crash took place behind them.
Russell appeared to be hit from behind at the start and was knocked into Zhou, whose car went flying across a gravel trap and over a tire wall into the retaining fence. The car was skidding on the “halo” which protects the driver's head.
Russell, who ran from his car to help Zhou, called it “one of the scariest crashes I’ve ever seen".
Alpine's Esteban Ocon limped back to the pits on three-and-a-half tyres, with the half flailing on a rim.
F1 governing body FIA said Zhou and Williams driver Alexander Albon were being medically evaluated but were both were conscious. Albon had spun into the pit wall.
The Alfa Romeo team said in a statement: "Zhou is conscious. There are no fractures. Considering the circumstances, he's pretty well."
The FIA also said that Mercedes driver Russell was not allowed to restart as he received mechanical assistance during the race.
“I’m glad to see Zhou okay. It was an horrific incident,” Russell told Sky Sports.
“I jumped out of the car to see that Zhou was ok. When got back to car I couldn’t restart it. As soon as you get outside assistance you cannot restart the race.”
You can see images from the crash in the gallery above. To move on to the next image, click on the arrows, or if you're using a mobile device, simply swipe.
CHINESE GRAND PRIX STARTING GRID
1st row
Sebastian Vettel (Ferrari)
Kimi Raikkonen (Ferrari)
2nd row
Valtteri Bottas (Mercedes-GP)
Lewis Hamilton (Mercedes-GP)
3rd row
Max Verstappen (Red Bull Racing)
Daniel Ricciardo (Red Bull Racing)
4th row
Nico Hulkenberg (Renault)
Sergio Perez (Force India)
5th row
Carlos Sainz Jr (Renault)
Romain Grosjean (Haas)
6th row
Kevin Magnussen (Haas)
Esteban Ocon (Force India)
7th row
Fernando Alonso (McLaren)
Stoffel Vandoorne (McLaren)
8th row
Brendon Hartley (Toro Rosso)
Sergey Sirotkin (Williams)
9th row
Pierre Gasly (Toro Rosso)
Lance Stroll (Williams)
10th row
Charles Leclerc (Sauber)
arcus Ericsson (Sauber)
Tearful appearance
Chancellor Rachel Reeves set markets on edge as she appeared visibly distraught in parliament on Wednesday.
Legislative setbacks for the government have blown a new hole in the budgetary calculations at a time when the deficit is stubbornly large and the economy is struggling to grow.
She appeared with Keir Starmer on Thursday and the pair embraced, but he had failed to give her his backing as she cried a day earlier.
A spokesman said her upset demeanour was due to a personal matter.
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