Finland will not extradite a Russian suspected of terrorism in Ukraine to Ukraine, the Finnish Supreme Court ruled on Friday, citing the risk of inhumane prison conditions in Ukraine, Reuters reports.

Russian citizen Jan Petrovsky was detained by Finnish authorities in August after a Ukrainian court issued an arrest warrant for a man suspected of involvement in a terrorist organization in Ukraine, according to Finnish court documents seen by Reuters.

Social media channels linked to Wagner PMC mercenaries reported in August that Petrovsky was a leading fighter in Rusych, a far-right unit linked to Wagner.

Rusich named Petrovsky as one of the founders and head of the unit, which has been under EU and US sanctions since last year.

Court documents indicate that in Finland, Petrovsky used the name Voislav Torden.

“The Supreme Court stated in its opinion today that the request for Torden’s extradition cannot be accepted,” the court ruling said, referring to a previous ruling by the European Court of Human Rights, which found that Ukrainian prisons were overcrowded and faced severe shortages. . .

Thus, the court concluded that extradition to Ukraine could lead to inhumane and degrading treatment of Petrovsky.

Reuters notes that it was not possible to get a comment from the Ukrainian government.

The court decided to release Petrovsky, but he was immediately arrested by the Finnish border police.

“Following the decision of the chief investigator, we have taken the person into custody … and we are investigating the circumstances of his presence in the country,” Deputy Coast Guard Commander Mikko Hirvi told Finnish news agency STT.

Petrovsky, who previously lived in Norway, is a far-right activist who helped establish the Rusych unit as an overtly neo-Nazi unit in the early stages of the Donbass conflict in 2014.