Athletes with Russian or Belarusian passports have been banned from many sports since Russia’s invasion of Ukraine in 2022.
In September, the International Olympic Committee (IOC) said it would allow athletes from the two nations to compete at the Winter Games under a neutral flag and strict conditions, as they did at the 2024 summer Olympics.
Those conditions include showing they had not actively supported the war and were not contracted to the military.
In total, 20 competitors from Russia and Belarus are set to participate as Individual Neutral Athletes (AINs) at Milan-Cortina across eight sports.
However, four of the 13 Russian athletes approved to compete have links to activity supporting the war in Ukraine, according to evidence seen by BBC Sport.
They are figure skater Petr Gumennik, cross-country skiers Savelii Korostelev and Dariya Nepryaeva, and speed skater Kseniia Korzhova.
The IOC said it could not comment on individual cases but stated that the panel had “reviewed the athletes in accordance with the executive board decision and the principles it had established”.
None of the athletes named responded to BBC Sport’s requests for comment.