One man has died and two others taken to hospital in a stabbing outside Parsons Green tube station on Monday (October 16) night.
The area outside the station is currently sealed off with a heavy police presence at the scene.
The conditions of the two men who survived the attack is not known.
Confirmation of the fatality came from the London Ambulance Service (LAS).
Police later said the victim was in his 20s. Next of kin have been informed.
Police were called to the station, where 30 were injured in a terror attack last month, at 7.37pm.
One witness wrote on Twitter that she came out of the station to find three people receiving CPR.
Edward Carey said the area was “swarming with police”.
Another said police had closed a road, possibly in a search for weapons.
The Met says no arrests have been made.
LAS said: “We were called today at 7.38pm to reports of an incident off Parsons Green Road.
“We sent two ambulance crews, a first responder in a car and an incident response officer to the scene. A team from London’s Air Ambulance was also dispatched to the scene by car.
“We treated three patients at the scene. We have taken two patients to hospital as a priority. Sadly one patient died at the scene.”
Transport for London said trains are stopping as normal at Parsons Green, which which remains open, with police managing a cordon outside the entrance.
Police say the incident is not terror related.
Keep up to date with the latest news in west London via the free getwestlondon app.
You can even set it to receive push notifications for all the breaking news in your area