Williams's post Spanish celebrations came to a halt on Sunday as an "explosion" resulted in a serious fire in their garage.
An hour after Pastor Maldonado tasted the victory champagne in Barcelona, a fire broke out in the Grove squad's garage.
The BBC reported that there 'may have been an explosion in the garage possibly started by a Kers fire'.
It was a serious incident with ambulances and fire crews quickly on the scene.
According reports, a few mechanics from Williams, Force India and Caterham were taken to the medical centre for checks.
Force India Otmar Szafnauer confirmed that one of their staff was treated for smoke inhalation.
Caterham driver Heikki Kovalainen has Tweeted saying: "Couple of our guys got injuries, burns and maybe one broken wrist, no news on Williams guys I hope they're ok."
A report from the team read: "Caterham F1 Team was involved in a fire that started in the Williams F1 Team's garage after the end of the Spanish Grand Prix.
"All the team's employees have been accounted for and four people have been taken to the circuit medical centre for examination; one with a minor hand injury and three with respiratory issues."