Both of the alleged spies, who had used a ladder to climb into the Ādaži military base, are suspects in a case of espionage and trying to commit an act of terror.
As part of these proceedings the Security Police has made a number of searches and arrested the Bolshevik activist Lindermans, who has previously been under investigation for promoting anti-constitutional ideas about separating the Latgale region from Latvia.
He has been named a suspect in the criminal proceedings started about the incident at the military base.
Linderman is not allowed to leave the country and is prohibited from leaving his home at night. He also has to go to the police station twice a week, said her lawyer Jeļena Kvjatkovska.
She said that her client has not admitted to be connected with the incident at the military base.