A Russian-born U.S. citizen who was already behind bars in Russia on a bribery conviction has been handed a second sentence for espionage.

Eugene Spector was sentenced to a new 15-year term for his espionage conviction, according to Russian news agencies. Spector was born and raised in Leningrad, Russia, but later moved to the U.S. and became a citizen.

A Moscow court brought espionage charges against Spector in August of last year, although details surrounding the case were not made publicly available.

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Eugene Spector, a Russian-born U.S. citizen already imprisoned in Russia on a bribery conviction, has been handed a second 15-year jail term for espionage. (AP)

The U.S. State Department said it was aware of reports of a U.S. citizen in Russia being sentenced and that it was monitoring the situation.

Spector, a former executive at a medical equipment company in Russia, was sentenced in September 2022 to three and a half years in prison for enabling bribes to an aide of former Russian Deputy Prime Minister Arkady Dvorkovich.

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A Moscow court brought espionage charges against Spector in August of last year. (iStock)

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The aide, Anastasia Alekseyeva, was sentenced to 12 years in April for accepting bribes of two expensive overseas vacation trips.

Dvorkovich was a deputy prime minister under former Russian Prime Minister Dmitry Medvedev in 2012 to 2018. Dvorkovich is currently head of the international chess federation FIDE.

The Associated Press contributed to this report.