"We know well enough what the Russian secret services are doing in Latvia. I would describe it [the level of their activity] as moderately medium,” Maizitis said.
The foreign intelligence services, including Russians, are mostly interested in the subjects such as the political situation in the country and the actions and decisions by the Latvian state officials, he said.
The increased NATO presence in Latvia has been added to the list recently.
"This is a subject that holds interest for any country which is not exactly our friend,” the SAB chief said.
Berzins, whose term ends July 7, has spent recent days having farewell talks with various state officials.
Current Defense Minister Raimonds Vejonis takes over as President on July 8.