An 18 year old man has been left in a life threatening condition after being stabbed multiple times on Thyme Close, Kidbrook, SE3.
Scotland Yard say Police were called at 3.24pm to reports of a man being threatened with a knife.
A crime scene has been established.
No arrests have been made.
Police bosses have ordered a section 60 for the area and will remain in force until 7am on Wednesday
More to follow