The two Russians have been declared suspects in a criminal probe that has been launched over intrusion into the restricted territory of a military base in Adazi outside Riga earlier this week, the BNS newswire was told by the Latvian Security Police.
The status has been given to the two Russians in accordance with the articles of the Latvian Penal Law on spying and attempts to carry out terrorist activities.
The Security Police also asked the Riga City Vidzeme District Court to remand the suspects in custody because there are reasonable suspicions that these persons might try to avoid the pre-trial investigation.
For now, only one of the suspects, named as Andrey Popko - has been left in detention.
On Wednesday morning guards at the Adazi military base detained two Russian citizens who had illegally entered the base with a Russian flag and leaflets.
They were apprehended not far from the place where they had climbed the fence using a ladder. The detained persons were handed over to the law enforcement authorities. The Latvian armed forces are probing the intrusion.
More than 6,000 troops from Canada, Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Norway, Poland, Portugal, Slovenia, the UK and the US are currently taking part in the Saber Strike military exercise, which is taking place the Baltic states and Poland from June 8-19.