A man and woman have been injured in a double stabbing in west London, police confirmed.
Police were called at around 6.15pm today to reports that two people had been stabbed in Kirton Close, Chiswick, Scotland Yard said.
London Ambulance Service and London's Air Ambulance, which landed on nearby Turnham Green, all attended the scene. Both victims were taken to hospital for treatment, where the woman's injuries were said not to be life-threatening.
Police were waiting for an update on the condition of the man.
Hounslow police force is investigating and could not give the names or ages of the victims.
The force believe the pair were attacked by a man who fled the scene, and believe all parties are known to each other. No arrests have been made.
An eyewitness told the Press Association: "I made my way towards the ambulance and saw a young girl being treated for superficial neck injuries. She seemed to be okay, and she was pointing down the alleyway.
"I went down the alley as the police were taping it off and saw a man in the gutter, being treated by an ambulance crew. He was waving his arms trying to get up and they put him on a stretcher and into the ambulance."
Road closures remained in place around Kirton Close, and Chiswick High Road was open, the Met added.