A Russian military engineer has been convicted of treason for selling secret missile data to the CIA.
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According to Russia's secret police service, the FSB, Nesterets pleaded guilty to selling information about the testing of new strategic missiles systems to US intelligence agents.
No further details about his trial have been made public due to potential national security risks, RIA Novosti said.
Nesteret's sentence comes shortly after President Dmitri Medvedev announced that the FSB had exposed 199 foreign spies and agents in Russia last year, including Russian nationals working for Western countries, Agence France Presse reported.
The numbers indicate that "foreign secret services are stepping up their activities in Russia," Medvedev said.
AFP noted that Russia often discloses the arrest or conviction of foreign agents at times of diplomatic tensions with the West.
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