FSB allegedly dismantles the Polish espionage network in the Kaliningrad region.
The FSB says it has uncovered a network of agents linked to Polish intelligence services in the Kaliningrad region.
Two people suspected of working for Poland's military intelligence service and the Internal Security Agency (ABW) have been arrested on espionage charges. They are charged with gathering information on Russian military installations and service personnel in the area.
Another seven Polish citizens and three Russians were officially warned against engaging in espionage or treason.