A daredevil climber fell to his death from a high-rise building in Hong Kong after last being seen knocking on a window on the 68th floor.

Remi Lucidi, 30, also known as “Remi Enigma”, was seen by a building worker knocking from the outside of the window, suggesting he may have been trapped and asking for help, reported the South China Morning Post (SCMP).

Tregunter Tower, which Lucidi fell from on Thursday, is located in the city’s upscale Mid-Levels area.

The Frenchman had fallen 220 metres to his death by the time the police arrived and officers found his camera, containing video of extreme sports. Lucidi, who described himself as a Hong Kong-based photographer, had climbed structures across the world to capture selfies.

According to media reports, Lucidi arrived at the Tregunter building at 7.30pm (local time) on Thursday, telling a security guard that he was visiting a friend on the 40th floor, although the resident named has since denied knowing him.

CCTV footage revealed that the climber took the elevator to the 49th floor and then the stairs to level 68 before forcing open the door to the rooftop. The Frenchman had been staying in a hostel in the city’s Tsim Sha Tsui area.

The Daily Telegraph, London