Two men were stabbed during a fight between catering team workers at Sony Music's headquarters in central London.
16involved in a violent altercation.17
After the incident armed police arrived and ordered mass evacuation of the office building on Derry Street in Kensington, according to the BBC and CNN.
Sony said London's Metropolitan Police Service was handling the incident.
Police officers and paramedics were called about 11:00 GMT.
45running around chasing each other.46
53Two men... were found suffering from stab injuries. They were both arrested at the scene on suspicion of causing grievous bodily harm
61The men have been taken to hospital where they remain. Their injuries have been deemed non-life threatening.62
The Met said there was no evidence of any firearms involved. Nor was the incident being treated as terror-related.
76loads of people77
84Then running down the road came a whole host of armed police officers
London Ambulance Service said paramedics had taken one person to a major trauma center and another was taken to hospital.