The pit lane of the Ciಌrcuit de꧑ Catalunya was wreathed in acrid smoke and hastily evacuated after a flash fire broke out in the Williams garage just as the team was celebrating a famous victory in the Spanish Grand Prix.

Shortly after everyone had gathered together for a team photo to mark the occasion, team owner Sir Frank Williams was giving a short speech to t𝕴he team in the garage when there was a small explosion and a fire broke out at the back of the temporary garage area.

The area engulfed by flames was near where the race fuel was stored, and it's believed that wo💖rk had already underway draining unused fuel from Bruno Senna's race car in readiness for transportation to the next event in Monaco when the rig started to leak fuel.

How the fuel leaked, a⛦nd what sparked the fire, is not yet clear and will be formally investigated by Spanish authorities. Initial theories suggested 🐬that a spark from the car's KERS battery might have been the imediate source of ignition.

No one was directly hurt in the immediate explosion or in the initial outbreak of flames, and everyone hastily rushed out of the garage area as it filled up with billowing black smoke. Sir Frank himself was removed to safety, and race winnꦆer Pastor Maldonado helped carry out☂ his shocked family members to the paddock area.

In the immediate response to the fire, Williams crew grabbed fire extinguishers and attempted to tackle the flames, and were joined in their effor𒁏ts by personnel from teams up and down pit lane rushing to their assistance and bringing further extinguishers with them. Round the back of the garage area, fire hoses were deployed.

It's believed that a number of those tackling the fire suffered from smoke inhalation, and at least one person was reported to have suffered burns ♒to his legs after his trousers were set al𒀰ight.

All those affected were removed to the infield medical centre, where a group of worried Williams personnel were seen gathered awaiting news. The medical helicopter was also dispatched, and it's undeℱrstood that at least one person was taken to hospital for evaluation and treatment.

Caterham F1 - which had a garage adjoining that of Williams in Barcelona - issued a statement which said that "four people have been taken to the circuꦜit medical centre for examination; one with a minor hand injury and three with respiratory issues.

"A further statement will be issued when more details about the incident are confir♚med," the stꦅatement added.

Williams also said that four of its crew were receiving treatment in the medical centre, and Force India staff have said that one of their team members was being treated for smoke inhala📖tion.

In total, it's thought that 16 people required treatme༺🐭nt, with one person being taken to the nearby hospital.

Both BBC TV and Sky Sports F1 were broadcasting live from the pit lane when the fire broke out, which sen⛄t plumes of smoke high into the air above t🎃he Circuit de Catalunya for over ten minutes.

"I saw the fire take hold and it just absolutely erupted," said Sky Sports F1 pit lane reporte⭕r Ted Kravitz. "We were talking to🙈 Alex Wurz at the time and we were just having a look 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," he added. "There will be an immense amount of da💜mage to a𒈔 lot of equipment."

By the time emergency vehicles arrived on the scene, the fire w♉as largely out, although smoke continued to drift out of the garage area for some time. The fire did not appear to have spread to neighbouring garages, and concrete construction meant that it did not directly affect the hospitality areas overhead.

Subsequent photos of the scene showed a gutted garage area, still containing the burnt hub of Bruno Senna's race car, which had retired mid-race. Pastor Maldonado's car would still have been elsewhere on pit lane under parc ferm? conditions for technical inspection.

The situation is still developing and remains very confused. Updates, corrections and clarifications will be given when available.