A US court sentenced a Bosnian citizen to more than seven years in prison on Monday for illegal arms trafficking which included shipping parts of firearms to a group of neo-Nazis in Sweden.

The U.S. District Court in Seattle found Hany Veletanlic, 36, guilty of “violating the Arms Export Control Act, illegally possessing two unregistered silencers, and possessing a firearm with an obliterated serial number” in February last year.

The U.S. District Court in Seattle sentenced the Bosnian citizen, who legally resided in Tulalip, Washington, to 85 days behind bars.

“Veletanlic ultimately admitted shipping packages of firearms overseas – as many as 20 different shipments to two different customer groups in Sweden. He also has admitted shipping firearms parts to people in France, Russia, and Brazil,” a press release by the US Attorney’s Office of the Western District of Washington said.

District Judge James L. Robart said at the sentencing that Veletanlic had run an illegal “lucrative business” and took “quite sophisticated steps” in an attempt to hide his activities, according to the press release.

The investigation began in 2017, after Swedish law enforcement seized parts of a Glock firearm, with its serial number filed off, from a residence in Fagersta, Sweden. Glock Inc, however, still managed to trace the sale of the firearm, which led investigators to Veletanlic.

He was arrested in May 2018.

According to the US Attorney’s Office, while Veletanlic was awaiting sentencing, he “communicated with others outside the prison about transferring firearms to someone he thought was associated with a criminal group” which he believed “was going to harm someone who had been a witness against him.”

“In reality, an undercover officer was posing as a possible gang member after inmates at the FDC alerted law enforcement to the scheme,” the press release said.