Italian police said on Thursday they uncovered a plot to form a new Nazi party and seized a cache of weapons during searches across the country.
Police in 16 towns and cities from the Mediterranean island of Sicily to the Alps in northern Italy took part in the investigation, which was launched two years.
The probe revealed a "huge and varied array of subjects, residents in different places, united by the same ideological fanaticism and willing to create an openly pro-Nazi, xenophobic and anti-Semitic movement", a police statement said.