A car has burst into flames at Heathrow Airport's terminal 3 car park.
Footage from the scene shows bright orange flames ripping through the structure, with thick grey smoke billowing from the site.
The blaze has sparked disruption on the M4 tunnel heading to Terminals 2 & 3.
A Heathrow spokesman said: "Earlier this morning our teams responded to a small vehicle fire in the Multi Storey Car Park for Terminal 3. The fire was quickly extinguished. The car park is temporarily closed which may cause some congestion on surrounding roads.
"This is an isolated incident and all other car parks at Heathrow are operating as normal. We apologise to passengers for any inconvenience."
The cause of the fire remains unknown at this stage.
Initial reports say a car, thought to be an electrical vehicle, burst into flames at around 9am.
Firefighters from Heathrow, Hayes and Feltham have been sent to tackle the blaze this morning.
Emergency services say they received eight calls alerting them to the fire, with the first coming in at 9.03am.
Four fire engines and around 25 firefighters have raced to the multi-storey car park to put the fire out.
The southbound M4 spur for HeathrowAirport is closed from the M4 J4 due to a fire in the car park, National Highways said.
Those travelling to HeathrowAirport are being advised to use the M4 J3 or the M25 J14.
Reports are it’s an electric car pic.twitter.com/krYQlh2Ulh
Buses travelling to Heathrow this morning have been forced to terminate after a car burst into flames at Terminal 3.
Arriva Herts & Essex said in a statement on X: "Good morning, due to a fire in Heathrow, the 724 service will be unable to serve the Greenways stop or Lees Road stop in both directions, the buses will be terminating and starting from terminal 5."
The M4 Spur and Heathrow Southbound tunnel has been closed following the blaze.
Drivers have been warned to expect long queues.
Car on fire at @HeathrowAirport terminal 3 car park pic.twitter.com/VKDCKVJnKW
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