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Armed police today stormed Sony's London headquarters after two people were injured in a 'brutal knife fight between kitchen staff'.

Staff at the music giant's HQ fled the building and cowered under tables during the incident.

The Met Police said one person has been arrested and two people suffered stab injuries.

Eyewitnesses report seeing 'blood everywhere' after one member of kitchen staff stabbed another worker with a large kitchen knife during a fight.

One Sony employee said: "We just heard screaming and running and people slamming doors.

The men, who are employed by a catering company, were "running round chasing each other" and "slashing each other up", he added.

One person was pictured being wheeled out of the building on a stretcher by paramedics.

The London Ambulance Service said one victim has been taken to a major trauma centre.

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(Image: Elliot Wagland / @elliotwagland)

(Image: PA) (Image: Elliot Wagland / @elliotwagland) (Image: Danny Howell)

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One person has been arrested and a man was seen being lead away from the scene in handcuffs and did not appear to be injured.

Pictures and footage from the scene show armed police entering the building in Kensington, west London.

Another shocked employee told the Standard one victim was 'stabbed in the upper thigh'.

He said: "It was between two kitchen staff. They were in uniform.

"There was a lot of shouting and commotion. It looked like they were having a fight. One had fallen over and was on his back and the other was standing over him. I thought he was raining punches down, but then I saw the knife.

"It was about six or seven inches long, and he was standing over him trying to get him, stabbing downwards as the other man put his arms up to defend himself.

"He was going nuts. There was a lot of shouting.

"Other staff were standing around - they didn't want to get too close because he had a massive knife.

"The guy with the leg injury had a towel wrapped around his leg, and the attacker was sitting down on the floor, still obviously very angry, with people trying to calm him down, and paper towels wrapped around his arm"

A woman at the building tweeted: "Was a stabbing downstairs. All are remaining in our locked rooms but we think police are now here".

She later shared footage of her evacuating the scene and said she's "never been so scared".

(Image: Elliot Wagland / @elliotwagland) (Image: Danny Howell) (Image: Danny Howell)

Trish Ellis told PA: "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."

"We just heard screaming in the canteen. Then we ran for the fire exit," a worker told MailOnline.

A witness reported said people were screaming as they ran away from the building.

"Large crowds of people began exiting the building's front door at around 11 o'clock," the onlooker said.

"Most were running, all towards Kensington Square Garden. Several were visibly panicked and some were screaming."

(Image: Twitter)

The scene is just yards from Kensington Palace which has a 24 hour armed police presence - and explains why armed officers were on the scene so quickly.

Simon Cowell has an office on the premises and is often seen on site when in London.

The X Factor judge was not in the building at the time of the incident.

The site is just off Kensington's bustling High Street which would have been full of shoppers at this time of day.

Another eyewitness shared pictures of the street filled with police cars and said: "Kensington High Street looks like a war zone right now".

The Met Police said there is no evidence of any firearms involved and it is not being treated as terror related.

(Image: Twitter) (Image: PA) (Image: AFP/Getty Images)

They are awaiting updates on the victims' conditions.

Scotland Yard said: "Officers, including firearms officers, and London Ambulance Service are in attendance.

"Evacuations have taken place as a precaution. One person has been arrested."

The London Ambulance Service said: "We responded along with our colleagues @metpoliceuk to this incident in Derry Street, W8. We have treated two people at the scene and are taking them to hospital.

"We took one to hospital and one to a major trauma centre.”

Derry Street has reopened but police remain at the scene as the investigation continues.

Sony VP Morvan Boury tweeted: "Please be advised that all Sony Music employees in our London office are safe and have been allowed to return to work following an incident earlier today involving two individuals employed by a third-party vendor. As a precautionary measure, the office was temporarily evacuated.

"The local police are investigating the incident, and we will continue to monitor the situation."