Dyatlov Pass incident

Another theory is the spy theory.

An excerpt from the article 39 facts about Dyatlov Pass incident

It assumes that the KGB or GRU agents (given the military units stationed in the area) were involved in the death of the Dyatlov group. The group of tourists included people who had access to secret information about the Soviet atom, especially Alexander Kolevatov. This version assumes that the agents confronted tourists at night and led them out of the tent. The theory does not specify what happened between the groups; one interpretation is that the confrontation got out of hand. Other researchers point out that the tourists frightened out of the tent, would have had considerable difficulty getting to the Siberian pine in the middle of the night, pointing out that the group's footprints were not scattered, as if the group had been led. This version of the theory assumes that the agents' goal from the beginning was to deprive the tourists of their lives.