BERLIN — German customs officers arrested five men Monday for allegedly violating European Union embargoes on Russia by exporting industrial goods to Russian arms manufacturers.

The defendants arranged for around 16,000 deliveries to Russia, according to the ongoing investigation, with illegal transactions amounting to at least €30 million, the office of Germany’s Federal Public Prosecutor General said in a press release.

The arrests come as authorities in Kyiv urge European leaders to crack down on exports of industrial goods and parts that Russia can use to manufacture weapons deployed in the war on Ukraine. Among the five people charged are two suspects with dual German-Russian citizenship and one with dual German-Ukrainian citizenship.

Central to the investigation is a trading company in the northern German city of Lübeck owned by a suspect identified by the court as Nikita S.

“Since the beginning of Russia’s war of aggression against Ukraine in February 2022, he and the other defendants have used the company to conspiratorially procure goods for Russian industry and export them to Russia on numerous occasions,” said prosecutors. “To conceal their activities, the defendants used at least one other shell company in Lübeck, fictitious buyers inside and outside the European Union, and a Russian company as the recipient, for which Nikita S. also holds a position of responsibility.”

The “end users” of the exported goods included at least 24 listed defense companies in Russia, prosecutors said. Russian government agencies allegedly supported the procurement, according to the statement.

The exports involved, among other things, mechanical and technical components for Russian arms production, such as ball bearings and semiconductor devices, according to a report by public broadcaster ARD.