Chaos has erupted after a car, believed to be an electrical vehicle, burst into flames at Heathrow Airport's terminal 3 car park.

Footage from the car park shows orange flames in the background as thick grey smoke was billowing from the site.

The fire has sparked chaos as the tunnel heading to Terminals 2 and 3 have been closed.

Buses travelling to Heathrow have been forced to terminate after the car burst into flames.

A statement from Arriva Herts & Essex on X stated: "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 statement concluded.

Heathrow, Hayes and Feltham firefighters have rushed to the scene to extinguish the blaze.

Emergency services have indicated that eight calls were received with the first being just after 9am.

Outside the car park at Terminal 3 where smoke can be seen in the air

It is understood four fire crews with about 25 firefighters were sent to the car park.

While the cause of the fire is still unknown, it is believed to be an electrical vehicle which burst into flames about 9am.

Heathrow Airport has been contacted for comment.