Environmental activists managed to enter the course to try to stop the 20 kilometer skiathlon race, which was won by the favorite Johannes Høsflot Klæbo.
Security guards put an end to the planned action by tackling the activists, Viaplay reports in the broadcast.
According to the TV channel, the activists managed to throw something orange-like across the ski track before being carried away by the guards.
Briton Andrew Musgrave came second and Didrik Tønseth (Norway) finished third.
Best Swede was Calle Halfvarsson with a fifth place.