A teenager has been stabbed to death in a knife attack on a south London high street.
The young man, who has not yet been formally identified, died at the scene in Brighton Road, Purley on Thursday after paramedics fought to try and save his life.
Two more teenagers were found near the scene with non-threatening stab injuries, and were taken to hospital.
Scotland Yard said one of the teenagers found injured near Purley station was arrested on suspicion of attempted murder, while two other teenagers are in police custody after being held on suspicion of possessing an offensive weapon.
Officers were called to the scene at about 9.10pm on Thursday with police, paramedics and London’s Air Ambulance attending.
Crime scenes were set up along Brighton Road, while a section 60 order, giving police special search powers, was authorised.
Customers at a local Pizza Express were forced to leave through the back entrance to avoid the violence, the Evening Standard reported.
The killing marks the sixth murder probe launched in the capital in seven days.
Elsewhere, a man in his 40s is in a critical condition after he was shot outside a house owned by comedian Russell Kane in Woodford Green, north-east London.
Armed officers, along with medics, were called to the scene and the victim was taken to hospital with gunshot injuries. Scotland Yard said no arrests have been made.
The house is understood to be rented to tenants by Kane, who lives in Manchester.
His spokeswoman said: “Russell’s thoughts are with the victim and his family at this terrible time. No further comments will be made whilst the incident is being investigated by the police.”
In a separate incident, a man believed to be in his 20s was stabbed in Barking Road in Canning Town, east London on Friday morning.
The victim was taken to hospital, where his condition is not yet known.
Amid the latest violence, the Metropolitan Police said in a statement: “Bearing down on violent crime on the streets of London continues to be a top priority for the Met.
“Teams across the city are working tirelessly - day and night – to identify and pursue offenders, help bring perpetrators to justice, take weapons off the street, support victims, engage and reassure the public, and keep our communities safe.
“However, the police cannot solve this problem alone. The police, our partners and the public must work together to deal with knife crime and prevent further lives being lost. Communities have a vital role to play in tackling violent crime.”
Any young people with information about violence are encouraged to visit www.fearless.org, where they can pass on information anonymously.