The Russian embassy in Madrid on Friday confirmed with reference to Petr Levashov's lawyer that the programmer was extradited to the United States.
"Such decision of Spanish authorities is regrettable: according to universally accepted judicial norms, the Russian request [for extradition] has a priority because Petr Levashov is a Russian national," the statement reads.
Earlier in the day, Spanish national police announced that a "cybercriminal who has created global cybernetic infrastructure for conducting illegal criminal activities" was handed over to US Marshals.
Last April, soon after Levashov was detained, the New York Times revealed that US law enforcement agencies had been preparing an operation to capture the programmer for several years and even visited Moscow in order to get assistance on that. However, the report noted that US authorities didn't seek help.
Meanwhile, the Russian Foreign Ministry issued a notification saying that the Russian citizens may be detained or arrested at the requests of US security services.
"Despite our calls to establish cooperation between the authorities of Russia and the United States on the basis of the bilateral Treaty on Mutual Legal Assistance in Criminal Matters of 1999, the US intelligence services continue to actually "hunt" for Russians around the world," the statement by the ministry reads.