The elderly pair were captured by Cuban security forces after a search of several days in the mountains of Pinar del Rio. Mr Martinez once fought in Castro's rebel army, but later changed sides and served time in jail before going into exile. Their case has not been mentioned by the Cuban Government or state media. It was not clear when the sentences were handed down, but Mr Sanchez said he received confirmation on Monday night. He said the trial took place last month behind closed doors.
Correspondents say it is unclear what the pair sought to achieve in their mission.