Arrests Over Military Site Surveillance
According to the FSB, the two detained individuals were agents of Poland's secret services. Their alleged task was to gather details about military facilities in the Kaliningrad region. No further information was given about who they are or exactly what they were said to have found.

Kaliningrad sits on the Baltic coast, so any claim of spying there is likely to draw attention. For now, though, the claims come only from the Russian side, and nothing in the announcement points to outside confirmation.

Seven Polish Citizens Barred From Entry
That was not the only step the agency mentioned. The FSB said seven Polish citizens have received warnings and have been banned from entering Russia. The reason, it claimed, was their contacts with Polish security services.

The agency did not say who the seven people are or give details of those alleged contacts. Whether Poland will respond to either announcement is not yet known.