After receiving the convict's plea, Lithuania's Justice Ministry turned to Moscow for the man's "handover for serving the remainder of the sentence in Lithuania," the ministry's spokesman Audris Kutrevičius said on Friday.
Detained in Russia last year, Tamošaitis was sentenced in March. Moscow then said the Lithuanian citizen had admitted to working for Lithuania's military intelligence.
In April, another Lithuanian citizen, Yevgeniy Mataitis, was sentenced to 13 years in prison on the charges of spying. Mataitis has dual Lithuanian and Russian citizenship.
Two Russian citizens are currently in detention in Lithuania awaiting trial, including one person identified by Lithuanian prosecutors as full-time employee of the Russian Federal Security Service.
Lithuanian and Russian politicians and law-enforcement bodies have not yet commented on a possible exchange.
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