A serious fire has broken out in the Williams pit garage after the Spanish GP.
Smoke was seen billowing out of the Williams pit roughly an hour after the team's victory at Barcelona.
However the flames are now believed to have been put out.
Sky Sports F1's Ted Kravitz witnessed the event and said: "I saw the fire take hold and it just absolutely erupted. We were talking to Alex Wurz at the time and we were just having a look [into the garage] and suddenly I saw this wall of flame erupt from behind the Williams garage divider.
"It looked to be in the area where they store things like fuel and oil and gearboxes and computers and there will be an immense amount of damage to a lot of equipment."
It understood that a Force India mechanic had been taken to hospital and Kravitz added: "Frank [Williams] was wheeled out very quickly, I saw it myself over my shoulder.
"I'm pleased to see I haven't seen any ambulances going to the aid of any people. I'm not saying there are not causalities because we just don't know that at the moment. There are a lot of Williams people who have inhaled smoke."
The severity of the fire and the injury toll is unclear.