Three people have been rushed to hospital after a stabbing outside a West London tube station.
Officers and paramedics swarmed the scene on Station Parade outside Willesden Green Underground Station.
London Ambulance Service also sent an incident response officer, a clinical team manager and paramedics from its tactical response unit, as well as trauma teams in cars from London’s Air Ambulance.
They treated two people for stab wounds and a third person for a head injury.
The Metropolitan Police said four men, two aged 21 and one aged 20, were rushed to hospital with stab injuries.
It added that a 20-year-old woman who reported breathing difficulties declined medical treatment at the scene.
A 20-year-old man, who was also stabbed but whose injuries are not thought to be life-threatening, has been arrested on suspicion of attempted murder.
Police do not believe this incident to be terror-related.
Officers and paramedics swarmed the scene on Station Parade outside Willesden Green Underground Station
London Ambulance Service also sent an incident response officer, a clinical team manager and paramedics from its tactical response unit, as well as trauma teams in cars from London’s Air Ambulance
The road was sealed off for several hours as forensic teams combed the scene for evidence.
Specialist CBRN (Chemical, Biological, Radiological and Nuclear) units were scrambled amid initial fears of a hazardous incident, but were later stood down when it was confirmed there was no chemical threat.
The Met Police is now urging anyone with information to come forward.
Anyone with information should call 101 quoting CAD 8601/22Jun, or contact Crimestoppers anonymously on 0800 555 111.
A London Ambulance Service spokesperson said:’We were called at 9.02pm on Wednesday 25 June to reports of a stabbing on Walm Lane, NW2.
‘We sent a number of resources to the scene, including ambulance crews, an incident response officer, a clinical team manager and paramedics from our tactical response unit. We also dispatched trauma teams in cars from London’s Air Ambulance.
‘We treated four people in total. We took two patients to a major trauma centre and another patient to a local hospital. The fourth person declined further treatment.’
