The man from the Italian-speaking canton of Ticino was arrested in a hotel near Italy’s Forli airport, according to Swiss media.
Two others were arrested while police also seized neo-Nazi propaganda in raids in several cities.
Italian media say the raids were part of an investigation into Italian far-right help for Russian-backed separatist forces in eastern Ukraine.
Photo: Turin Police
The Turin special police force, called Digos, led the operations, assisted by police in Milan, Varese, Forli and Novara.
Italian media named those arrested as Fabio Del Bergiolo, 50, an Italian ex-customs officer and far-right Forza Nuova party activist; Alessandro Monti, 42, a Swiss national; and Fabio Bernardi, 51, also Italian.
Swiss media reported that Alessandro Monti comes from Bissone in the district of Lugano.
#Digos Torino ha concluso un’operazione nei confronti di 3 persone responsabili di detenzione di armi da guerra e da sparo.
Dalle indagini si è scoperta anche una trattativa per la compravendita di un missile aria – aria sequestrato in provincia di Pavia https://t.co/IvKFpgQ4Ox
— Polizia di Stato (@poliziadistato) July 15, 2019