The Russian Security Service, or FSB, said Eugene Spector collected information in the interests of the Pentagon, a Russian news agency reported on Friday.

Eugene Spector, a US citizen jailed for a total of 15 years this week after a Moscow court convicted him of espionage, was found guilty of passing

MOSCOW - Eugene Spector, a US citizen jailed for a total of 15 years on Dec 24 after a Moscow court convicted him of espionage, was found guilty of passing biotechnology secrets to the US, Russia’s FSB security service said on Dec 27.

Russian Deputy Foreign Minister Sergei Ryabkov said Moscow is considering taking steps to resume nuclear tests. He made the warning while cautioning President-elect Donald Trump against resuming nuclear testing next year in an interview with the Russian newspaper Kommersant.

Russia's point man for arms control cautioned Donald Trump's incoming administration against resuming nuclear testing, saying Moscow would keep its own options open.

Moscow has warned Donald Trump against resuming the testing of nuclear weapons when he takes office, saying it would “not rule anything out” in response to US aggression.

Russia's aviation watchdog said on Thursday all four Moscow airports had resumed work after the lifting of temporary restrictions that were introduced to ensure the safety of civil aircraft flights.

"To ensure the safety of civil aircraft flights, temporary restrictions have been introduced on the operation of Sheremetyevo, Domodedovo, Vnukovo, Zhukovsky and Kaluga airports," Rosaviatsiya said on Dec.

Russia's aviation authority announced on Thursday the temporary closure of five airports, including all four Moscow airports and one in Kaluga, located 160km southwest of the capital. The aviation watchdog Rosaviatsia did not provide a reason for the closures.