The Metropolitan Police officers were called to Hoskins Street at 5.40 PM on April 9 with reports from an altercation among four men.
They were sent to the scene with the London ambulance service, where they discovered that an 18 -year -old suffered from a white weapon wounds.
It was tasks for the hospital and its condition has confirmed the leg as a change of life.
A trial has not yet been made in relation to the incident.
Urgent consultations are now underway to locate other people involved in the fight.
Related: Teenage tasks to the hospital after being stabbed in Greenwich
A spokesman for the Metropolitan Police Service said: “Around 5:40 p.m., on Wednesday, April 9, the officers were called an altercation among four men on Hoskins Street, Greenwich.
“We attended with the London ambulance service. An 18 -year -old man was treated at the place for weapon wounds and was tasks for the hospital. His injuries were evaluated as a change of life.
“No judgments have been made, and the officers are making urgent consultations to locate other people. Any person who has witnessed the incident, or who has potentially relevant information must communicate with the police in 101, citing the reference CAD 5965/09ABR”.
