The man, named only as "Konstantin B.," is the leader of a neo-Nazi organisation called PPDM, composed of Russian extremists, the Polish broadcaster reported on its rmf24.pl website.
The report was confirmed by Stanisław Żaryn, spokesman for Poland’s security services chief.
Some members of the PPDM are criminals, while the group operates like a criminal gang, rmf24.pl reported, citing Polish security services.
The man, who goes by the nickname "Truvor," has links with Polish neo-Nazis and has tried to promote the neo-Nazi movement in the European Union, the broadcaster added.
The ABW, Poland’s domestic counterintelligence organisation, asked the country’s Office for Foreigners to add Konstantin B. to a list of foreigners considered persona non grata, according to rmf24.pl.
The ABW said: “The unrestricted presence of this Russian on Polish territory carries a threat to security and public order, and also harms the interests of the Republic of Poland, including the international image of the country.”
Konstantin B. is a professional bodybuilder who has won titles including champion of Russia and 2008 champion of Eastern Europe, and was a bronze medallist in the 2008 Mr. Universe tournament, according to rmf24.pl.
Polish authorities said earlier this month they had decided to expel a Swedish neo-Nazi who arrived in the country for paramilitary training and who threatened national security.