Actress and model Elizabeth Hurley’s 21-year-old nephew is in hospital after being stabbed repeatedly in the back.
Hurley confirmed the “brutal” attack on her Twitter account, saying it is an “appalling” time for the family.
The Met Police could not confirm the victim’s identity but it has been widely reported to be Miles Hurley, who is also a model.
Police believe a group of men got out of a vehicle in south-west London and assaulted two men before fleeing.
Officers were called on Thursday to Ascalon Street, near Battersea Park, at 20:52 GMT following reports of a stabbing.
London Ambulance Service took the two men to a south London hospital, where they were treated for stab wounds.
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The second man, also believed to be aged 21, has been discharged but the other victim, believed to be Mr Hurley, is still being treated.
Police said his condition is not life-threatening or life-changing.
In an Instagram post, Hurley said her nephew had lost more than four pints of blood in the attack.
“A policeman was patrolling close by and administered first aid until the ambulance arrived,” she wrote. “The deepest wound just missed severing his spine.
“By some miracle no vital organs were damaged. We are praying that these animals are caught before they maim, or even kill, someone else. These are sad days.”
No arrests have yet been made and Wandsworth detectives continue to investigate.
The Estee Lauder ambassador has previously shared Mr Hurley’s modelling photos, tweeting: “Here’s my handsome nephew.”