A man has died after being hit by a train at Hounslow Central tube station.
Paramedics from the London Ambulance Service attended but the man died at the scene.
Hounslow Central station is closed until further notice.
Motorists are urged to avoid the area as Lampton Road has been closed in both directions due to the incident.
Hounslow MPS reported on Twitter "Due to an incident at Hounslow Central Underground Station Lampton Road is completely closed.
"Please avoid the area to minimise disruption!"
A number of buses including 120 and H20 are also on diversion.
Officers are not treating the death as suspicious.
They are working to contact next of kin.
A spokesman for BTP said: "A person has sadly died after being struck by a train at Hounslow Central Underground Station in London.
"We were called at 10.17am today and attended alongside colleagues from the ambulance service, but a man died at the scene.
"The death is not believed to be suspicious and we are now working to contact his next of kin."
This is the second fatality on the Piccadilly Line this week, after a man died after being hit by a train at Hounslow East station on Monday (February 27).
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Time to close the blog
Thank you for joining us today following the tragic death of a man who was hit by a train at Hounslow Central tube station.
You can read our full story on the incident here: http://www.getwestlondon.co.uk/news/west-london-news/hounslow-central-incident-underground-station-12673711
There are still minor delays on the Piccadilly line this afternoon and commuters are warned trains and platforms may still be busy.
Minor delays are now being reported by TfL on the Piccadilly line following this morning’s tragedy at Hounslow Central station.
This is the second tragedy in 48 hours at a Piccadilly line station in Hounslow
On Monday (February 27) we reported the death of man in his 60s at Hounslow East tube station. He was hit by a Piccadilly line train in the early part of the afternoon.
Severe delays continue on the Piccadilly line
Following the tragedy at Hounslow Central station this morning Transport for London is reporting severe delays on the entire line.
Photos from the scene
Latest following this morning's tragic incident
Read the full story following this morning’s tragic incident at Hounslow Central station
Video from the scene
Watch footage taken from near the scene of the fatal incident at Hounslow Central today.
Buses resume service on normal route
Lampton Road re-opens
Lampton Road has also re-opened following the earlier incident at Hounslow Central tube station.
However it is down to one lane as emergency services continue to work in the area, Hounslow Police reported on Twitter.
Hounslow Central station re-opens, expect delays
Hounslow Central tube station has re-opened following the earlier incident in which a man sadly died after being hit by a train.
However there are severe delays between Cockfosters and Acton Town and minor delays on the rest of the line.