A prosecutor has asked a court in southern Russia to sentence a man charged with high treason to 13 years in jail.
Lawyer Oleg Yeliseyev said on January 13 that his client, Pyotr Parpulov is innocent and must be released.
Parpulov, a former employee of the international airport in the Black Sea resort of Sochi, was arrested in March 2014.
His relatives have said that Parpulov was accused of passing classified information to foreign agents during a trip abroad in 2010.
The case is one of several in recent years in which Russian citizens have been accused of high treason and/or disseminating classified or sensitive information.