Two people were stabbed after an argument broke out between kitchen staff at Sony Music’s London headquarters.

Firearms officers descended on the building in Kensington, central London, at about 11am on Friday.

Two men with stab injuries were arrested at the scene on suspicion of causing grievous bodily harm and taken to hospital in non-life threatening conditions, Scotland Yard said.

Officers confirmed the incident is not being treated as “terror related” and said no other suspects are being sought at this time.

Sony Music said in a statement that the building was evacuated after “two members of the catering team were involved in a violent altercation” at the Derry Street office.

Staff at the record company described the chaos that ensued.

“We just heard screaming and running and people slamming doors,” said one employee who did not want to be named.

The kitchen workers were “running around chasing each other” and “slashing each other up”, he added.

Armed police officers run to the scene (PA)

Footage filmed from an office opposite showed a number of armed police entering the building through the front door.

Trish Ellis, a personal assistant at the Mail on Sunday who witnessed the incident, said: “It started opposite our building in Derry Street, usual sirens and racket but then we heard shouting, and more and more sirens.

“A few people came out, then armed police were going in six-plus at a time, and more and more of them, but they seemed to be keeping people in the building.

“Gradually they started to release people in tens, twenties, and a stretcher turned up with all the medical kit on it, but just stayed outside.”

Security and police officers at the scene (Stefan Rousseau/PA)

A London Ambulance Service spokeswoman said one patient was taken to hospital, the other to a “major trauma centre”.

Scotland Yard said: “Two men were found suffering from stab injuries. They were both arrested at the scene on suspicion of causing grievous bodily harm.”