Aleksejus Greicius, a public figure and managing director of the Baltic Youth Association Juvenis received a four-year jail sentence, and Mindaugas Tunikaitis, who confessed and cooperated with the investigation, was sentenced to a year and a half in prison, Klaipeda Regional Court said.
The trial was held behind closed doors.
Both men were accused of collaborating with Russia's Federal Security Service to collect intelligence information in Lithuania.
The defendants did not know each other, but they were in contact with the same FSB agent from Russia's Kaliningrad region. Both men collected and passed on the information for a fee.
According to the case-file, Tunikaitis lived close to the border with Kaliningrad and made regular trips to the Russian region, where he was met and recruited by the FSB officer. For almost six years, the Lithuanian citizen observed, photographed and filmed objects, and collected information online or through other people.
Tunikaitis confessed to the espionage charges and gave testimony that helped law-enforcement get a complete picture of the foreign intelligence agency's activities, according to the court.
For almost four years, Greicius organized events wholly or partially financed by the Russian intelligence officer, photographed or filmed the events and people attending them, gathered information relating to these events and published it in Lithuanian media, and passed the information on the Russian officer, according to the court.
The defendant denied the espionage charges, but the court concluded that there was sufficient evidence to prove his guilt.