It was reported last week that Russian officials are reopening a probe into the Dyatlov Pass Incident, the deaths of nine skiers who died under mysterious circumstances during a skiing trip in the northern Ural Mountains in 1959.

There are numerous conspiracy theories surrounding the deaths of the skiers.

According to Alexander Kurennoi, who made the announcement, some kind of natural phenomena caused the deaths. He added that families of the victims, the public and media still want to know what happened there and doubt whether they have been told the truth.

The tragedy happened when a group of fellow students went to a skiing expedition across the northern Urals in January 1959. The group of experienced Grade II-hikers with ski tour experience consisted of seven men and two women aged from 20 to 38 led by a 23-year-old Igor Dyatlov.

The incident began when the students went on a skiing trip across the Ural Mountains in January 1959. They were led by Igor Dyatlov, a student at Ural Polytechnic Institute, and the group — in all, seven men and two women — started off on what they hoped would be a 16-day journey.

The students were supposed to send a telegram to their sports club when they arrived at Vizhai, no later than February 12, 1959. When no telegram was received, the families of the skiers demanded a search operation that was launched on February 20, 1959. The rescuers found a tent that appeared to be cut open from the inside.

The bodies of two men dressed only in underwear were discovered near a tree. Three other bodies were found not far from the tent. A couple of months later, the bodies of four other students were discovered more than 500 meters from the tree. One victim was missing their eyes and tongue, and others had broken bones and skulls.