A murder investigation has been launched after a man died after being stabbed on London's main shopping street.
The incident took place outside a branch of McDonald's on Oxford Street, near Oxford Circus underground station
Police were called to the scene at 4.47pm, as were the London Ambulance Service.
Two ambulances, two fast response cars and a duty manager were sent to the incident.
"Our first vehicle arrived within five minutes and we found a male in his 20s who was in cardiac arrest," an ambulance service spokesman said.
The man was taken to St Thomas' Hospital where he was pronounced dead.
The victim has not yet been formally identified and a post-mortem is expected to take place.
An incident room will open under detectives from the Homicide and Serious Crime Command.
Police cordoned off the busy shopping street while their investigations continued.
Dozens of buses were diverted with nine routes being affected.
A spokeswoman for Transport for London said: "The street was closed off at around 5pm and we had to divert bus routes No 7, 8, 10, 25, 55, 73, 98, 176 and 390.
"If the road remains closed until later tonight it may well affect night bus routes as well and passengers are advised to call TfL if they need travel advice," she said.
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