This footage shows dozens of people being evacuated as smoke-filled the central line platform at Holborn Station.
In the video crowds of commuters can be seen leaving the London Underground station while fire crews attended the incident on Tuesday (August 15) morning.
Sarah Marshall said on Twitter: "Loud bang at Holborn, smoke and then an evacuation.
“Lots of people ran but others encouraged people to walk and situation was calm.
"I was towards back of crowd.
“There was smoke at one end of the station, a high pitched bang and a smell.”
The incident affected people travelling westbound on the Tube on the Central line.
Another person also described hearing "a massive bang followed by acrid white smoke."
Around 10 firefighters and two fire engines were called to reports of smoke on the platform at Holborn underground station.
A spokesman for the London Fire Birgade said: "The station has been evacuated.
"It was an overheated compressor on a train not a fire.
"The Brigade was called at 9.09am and the incident was over by 9.58am."
Fire crews from Soho fire station were at the scene.
This is the second station evacuation because of smoke on the underground within a week.
On Friday (August 11), a fire led to passengers on the tube at Oxford Circus station being evacuated .
There was also further chaos on the transport network today (Tuesdat August 15) due to a signal failure causing problems on both the Piccadilly and District lines.
This was in addition to the derailed train outside Waterloo causing problems for South West Trains.
Major delays continue on the Central line and Piccadilly line.
Nigel Holness, London Underground’s director of network operations said: “At around 9.10am our staff were alerted to reports of smoke under a Central line train at Holborn.
"Our staff immediately contacted the emergency services, who attended and investigated the incident.
"The cause of the smoke was a fault on one of our trains and it has now been taken out of service.
"I apologise for the concern this would have caused our customers at Holborn this morning and for the disruption.
"The station reopened at around 10.05am and trains have been stopping there since.”
British Transport Police said in a statement: "We were called to Holborn underground station at 9.08am following reports of smoke on a platform.
"This is now believed to have been caused by a train fault.
"The station was closed and officers attended along with the fire service."
For the latest updates on the status of the underground, head to our live blog.
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