Firefighters scaled scaffolding at the Randolph Hotel in Oxford to search for a missing climber.
It is understood the climber got onto the scaffolding in Magdalen Street at about 1.30am on Sunday.
Police and firefighters were called and firefighters climbed flights of steps on the scaffolding in a search for the trespasser.
POLICE UPDATE - officers confirm man has fallen from Randolph scaffolding
It has now been confirmed the man, who is not a student, has suffered potentially life-threatening injuries after falling four storeys. He is now being treated in hospital.
An eyewitness said the pavement was still cordoned off at 3.30am.
One source said the climber had been partying at Fever nightclub in Magdalen Street, close to the hotel.
Renovation work at the five-star hotel has been progressing well.
DANCE ALL NIGHT: Randolph Hotel unveils £100,000 ballroom
In the autumn, scaffolding was erected to cover the frontage in Beaumont Street, including around the entrance, as the £1.5m restoration of stonework continued at the Grade II-listed hotel.
Cotswolds stonemasons have been brought in to clean and repair the Beaumont Street and Magdalen Street frontages.
READ AGAIN: Randolph Hotel revamp continues as scaffolding shrouds iconic building
A £100,000 renovation of the Morse Bar has now been completed.
The work was being overseen by the hotel’s general manager Simon Drake.
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