A Sony employee who was present when a knife fight broke out at the company's Kensington offices this morning recalled café staff "covered in blood".
The employee, who wishes to remain anonymous, told talkRADIO he witnessed "chairs overturned" and "pools of blood" on the canteen floor at Sony Music's London headquarters.
Sony Music said in a statement that the building was evacuated after "two members of the catering team were involved in a violent altercation".
"Suddenly you heard pots and pans being smashed around. I was about 50 metres from the café and then screaming and yelling and it sounded like there was a punch up going on or something. Then everyone was just yelling run, run, run," talkRADIO's source said.
Café staff 'covered in blood'
"Members of the café staff, they were covered in blood. They tried to help.
“The café staff thought well, they won’t attack me, but as soon as it started kicking off and spilling into the communal café, that’s when everyone went run run run, get out, get out.
"There was slashing of arms, legs, stabbing going on and then everyone at Sony just scarpered and left the building."
Two men with stab injuries were arrested on suspicion of causing grievous bodily harm, Scotland Yard said.
'You don’t expect to see it in a day to day office'
Armed police officers run to the scene. Image: PA
The source added: "At the end of the day it was two disgruntled café workers, and it went a bit far I think.
"There was a lot of blood around and some of the café workers, they had blood all over them as well. You don’t expect to see it in a day to day office building."