Firearms officers are at the scene of an incident in central London amid reports a man with a machete has entered a building belonging to Sony Music.
Two people suffered stab injuries at the Sony Music offices, which are based on Derry Street in Kensington, London.
A source who works at Sony told talkRADIO that staff in the building had received an automated phone call and email to inform them an incident had occurred.
The source added that a man wielding a large knife had been spotted in the kitchen of the building.
Scotland Yard said in a statement: "Police were called at approximately 1100hrs on Friday, 2 November to reports of an incident on Derry Street, W8.
"Officers, including firearms officers, and London Ambulance Service are in attendance.
"Evacuations have taken place as a precaution. Two people have suffered stab injuries – we await an update on their condition.
"One person has been arrested. No evidence of any firearms involved in this incident. It is not being treated as terror related.
"Officers remain on scene and the incident remains ongoing."