A British television cameraman was struck by a wheel which came off Mark Webber's car during a pitstop in the early stages of the German Grand Prix on Sunday.
The man, named as Paul Allen, will spend the night in hospital after suffering two broken ribs, a broken collarbone, concussion and bruises.
Red Bull were fined 30,000 Euros for letting Webber's car leave the pits without the wheel attached.
Formula One safety has been in the headlines since multiple tyre blow-outs at last weekend's British Grand Prix raised fears about drivers being hit by flying debris, and Sunday's incident will fuel concern about pitlane dangers.
Red Bull driver Webber came into the pits for a routine tyre change after nine laps but his crew took longer than usual because of a problem with the rear right tyre.
The Australian was released without the wheel being secured properly. It broke free and bounced into the oblivious British cameraman, knocking him flat on his back.
Allen was conscious throughout the accident and transferred immediately to the Nurburgring circuit's medical centre.
The FIA said: "He was treated at the circuit medical centre and then transported by helicopter to Koblenz Hospital.
"The Briton has been kept there, under observation. Further information from the hospital will be provided as soon as it becomes available."
It was later revealed that, while his injuries were relatively minor, Allen would be kept in hospital overnight for observation.
Webber was ordered to turn off his engine and the wheel was reattached, allowing the driver to rejoin the race near the back of the field.
Supplier Pirelli have brought different tyres, with an inner ring of synthetic fibre Kevlar rather than steel, to Germany after the controversial blow-outs at Silverstone.
There were no failures in practice or qualifying.
HOW IT HAPPENED
1-Webber leaves his pit box before right rear tyre has been correctly secured.
2-As Webber accelerates away, the wheel comes off and rolls down the pit lane.
3-Mechanics scramble for cover, but the oblivious cameraman faces the opposite way, filming.
4-Allen is knocked to the ground as the wheel bounces off him.
(Screen grabs from live television coverage)
Reuters / Autosport
- Mark Webber
- Paul Allen