A teenager has been rushed to hospital after being stabbed in broad daylight, police said.
Emergency services raced to St Oswalds Road, in Croydon, South London, at about 3.20pm on Sunday.
A spokesman for the Metropolitan Police said a 19-year-old man had been stabbed and was taken to a south London hospital after.
His condition has been described as critical, but stable.
A cordon was set up after the violent attack and road closures were also put in place.
Officers confirmed there had been no arrests, and enquiries continue.
A Section 60 order was put in place for the whole of Croydon and Sutton following, meaning police have extra powers to stop and search any person or vehicle without need of reasonable suspicion.
Sutton Councillor Ryan Stoneman tweeted: “Really sad to hear about the gentleman who has been stabbed in Norbury.
“I welcome the declaration of Section 60 by the police covering Croydon and Sutton, to keep us all safe.”