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Heathrow Terminal 3 was partially evacuated on Monday afternoon (October 16).

The fire alarm went off at around 2.30pm and passengers were "ushered out" of the terminal.

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'A precautionary measure'

A spokesperson for the airport said passengers did not leave Terminal 3 while the alarm was investigated. She said they were moved from the affected area of the terminal to a different area within the airport.

She said it was “a precautionary measure”

View from the airport

https://www.instagram.com/p/BaT5P5DHevw/?taken-by=chickenruby

'Fire alarm going off'

'Ushered out'

She said they were ushered out after a fire alarm sounded

Video from the airport

This video was posted on twitter by @a_ljb

Comment from Heathrow

A Heathrow Airport spokesperson said part of the terminal was evacuated after a fire alarm sounded.

However, there was “no fire or smoke” and the situation was stood down at around 3.10pm

Siren sounding

This video shows a sea of people ‘going out’ of Terminal 3 while a siren sounds

https://www.instagram.com/p/BaT7B9ZHOBV/

Terminal 3 'partially evacuated'

Passengers in Heathrow have reported part of Terminal 3 has been evacuated