A Swedish man in his 50s has tragically died during the filming of the TV4 reality show "Berget" in Norway.

The incident occurred in Narvik, where the show features 15 participants competing to be the first to climb the 1,392-meter-high Stetind mountain.

The man suffered a sudden cardiac arrest, and despite immediate CPR efforts, he could not be saved.

TV4's HR and Communications Director, Karin Nyman, confirmed the death, describing it as a sudden illness.

The production was in its early stages when the tragedy struck, and a crisis team has been established in Narvik to support the crew and participants.

The future of the show's production remains uncertain as investigations continue.