A man is fighting for his life after being stabbed outside the venue of a child's birthday party.
Police are appealing for witnesses after the 53-year-old was attacked close to Chandlers Community Hall in Lambeth, south London at around 9.30pm on Saturday.
He was taken by ambulance to a south London hospital where his condition is critical, Scotland Yard said.
A force spokeswoman said: "The victim had attended a child's birthday party at the community hall and was stabbed outside the venue.
"Detectives do not believe that the suspect had attended the birthday party."
Anyone with information is asked to call police on 101 or Crimestoppers anonymously on 0800 555 111.