extract from bbc website
http://www.bbc.co.uk/sport/0/formula1/18051779
Williams's celebrations of first Grand Prix victory in eight years have been marred by injuries to four team members in a fire in the team's garage.
One of the Williams team has been taken to hospital, while four Caterham mechanics are being treated at the track's medical unit.
A Force India team member is also being treated on the site after suffering smoke inhalation.
The incident is believed to involve a Kers unit, which sparked a fuel fire.
Caterham, who occupied the garage next to Williams in the Circuit de Catalunya pit lane, have accounted for all their staff and explained that one of those injured had a minor hand injury, with three others suffering respiratory issues.
Fire breaks out in the Williams garage
The fire began at the back of the Williams garage
"Thanks for your best wishes to the team member who bravely went to fight the flames. He is being checked out in the circuit medical centre," read a Force India tweet.
The fire occurred after Williams's group photo commemorating Pastor Maldonado's victory , the Grove-based team's first since Juan Pablo Montoya's win in the 2004 Brazil Grand Prix.
Founder Frank Williams, whose family attended the race in celebration of his recent 70th birthday, was led to safety.
"I was there when [founder] Frank Williams was giving his speech to everyone," said Williams reserve driver Valtteri Bottas.
"I felt an explosion from behind, somewhere from the fuel area, and everyone ran out quickly."
Mechanics from several teams joined Williams's pit crew in attempting to extinguish the flames which sent smoke billowing across the paddock.
Maldonado's car was parked elsewhere awaiting post-race checks during the blaze, but the FW34 of team-mate Bruno Senna, who crashed out after 12 laps, was in the garage at the time.