A man has fallen from an escalator at the high-end department store Peter Jones in Sloane Square.
The individual, believed to be in his twenties, is in a critical condition in hospital with life-threatening injuries.
It is thought the man fell from the escalator at around 1pm.
Ambulance personnel attended the scene and police remain at the store and are conducting enquiries into how the man fell.
A Scotland Yard spokesman said: "Police were called at 1.05pm to reports of a man fallen from an escalator inside a department store in Sloane Square.
"Officers, paramedics and London's Air Ambulance attended and the man, believed to be in his 20s was taken to hospital suffering multiple injuries that are thought to be life threatening at this stage."
A spokesman for John Lewis confirmed the shop had closed early but would reopen tomorrow and that it would continue to work with the relevant authorities.Reuse content