Most of these were transport and reconnaissance aircraft flying with their onboard transponders switched off.
Russia said a couple of months ago that it had invited NATO experts to Moscow for talks on the possibility of all military aircraft keeping their transponders on during flights in the Baltic Sea region.
However, individual NATO member states have said that they will not hold talks with Russian experts at the technical level and propose that discussions on this issue be conducted within the Organization for Security and Cooperation in Europe.
The NATO air-policing mission is carried out from Lithuania and Estonia.
airBaltic plans to resume flights to London, Dublin and Dubrovnik but has no permits yet
Latvian airline airBaltic says it plans to resume flights from Vilnius to London and Dublin in...