Spanish police said Friday that they had arrested a Spaniard wanted by U.S. officials for working with an American to provide cryptocurrency and blockchain technology services to North Korea in violation of U.S. sanctions against the rogue state.

In a statement, Spanish police said they had arrested Alejandro Cao de Benos, 48, in Madrid on Thursday as he got off a train from Barcelona. He appeared before a judge Friday and was then released, pending the formal extradition process.

The U.S. Justice Department, in April of last year, indicted Cao de Benos along with British citizen Christopher Emms, then 30, accusing them of conspiring with a third man, U.S. cryptocurrency expert Virgil Griffith, to provide North Korea with training in the technology — in violation of U.S. sanctions.

Griffith was arrested and pleaded guilty to the charges. He was sentenced to 63 months in prison in April 2022. Emms remains at large.

According to a Justice Department statement following the indictments, Emms allegedly told North Korean officials the cryptocurrency technology they were offering to advise them on would have “made it ‘possible to transfer money across any country in the world, regardless of what sanctions or any penalties’ ” might be in place. In effect, they could evade U.S. sanctions.

If tried and convicted, Cao de Benos could face 20 years in prison. The extradition process, which the Justice Department must initiate and Spanish courts and officials must approve, could take months to complete.

Some information for this report came from Reuters and Agence France-Presse. 
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