Police were called to Oxford Street in central London after a person was stabbed in the world famous shopping district.
Scotland Yard said it responded at about 5.40pm on Saturday after getting reports of a stabbing at the junction with Market Place, not far from Oxford Circus Tube station.
"Officers attended and found a male suffering from a stab injury," it said in a tweet.
The injured person was taken by ambulance to a central London hospital.
There have been no arrests and the victim's current condition is unknown.