The British newspaper reports that a transmitter in Kaliningrad uses GPS jamming and spoofing to redirect Kyiv’s weapons towards the airspace of Nato member states, including Finland.A Ukrainian drone crashed in a forest near the city of Kouvola in eastern Finland earlier this spring. Image: PoliisiYle News12:29Russia is "hijacking" Ukrainian drones in mid-air and redirecting them towards the airspace of Nato member states, including Finland, according to a report by UK newspaper The Telegraph.There has been a spate of incidents in recent weeks where unmanned aerial vehicles (UAVs) have been detected in Finnish airspace as well as over Baltic states.In Finland, authorities advised the public to move indoors and remain there in the early hours of Friday 15 May following a suspicious drone sighting, while last week prominent politicians in Lithuania were forced to shelter underground after a drone violated the ​country's airspace.Drone sightings in Finland and the Baltics. Image: Antti Rossi / Yle, Mapcreator, OpenStreetMapAccording to The Telegraph, Russia is using a signal transmitted from a transmitter in the Kaliningrad exclave that disrupts the drones' GPS positioning and directs them westward. The transmitter has been operational for several years, but the newspaper reports that Russia is now able to use it to block the drones' connection signal to navigation satellites.The transmitter essentially blinds the drone's GPS system to its own position, and then sends a jamming signal that is more powerful than any other signal the drone could detect. The drone then begins to operate according to this "spoof" signal, the newspaper explained.The false signal makes the drone think it is much farther inside Russian territory than it actually is. It then corrects its course westward, toward the airspace of Nato nations.The Telegraph also revealed that the Russian transmitter can scramble the drone's computer time code, causing the UAV to think the time is, for example, a decade ahead.This confusion may lead to the drone restarting itself mid-flight or shutting down completely, according to Ramsay Faragher, director of the UK's navigation institute, and subsequently result in the drone crashing.The Telegraph added that Ukraine is aware of these problems and is trying to solve them.However, Keir Giles, a Russia expert at the research institute Chatham House, told the newspaper that Russia will no doubt continue with its GPS jamming and spoofing efforts."There is no reason for Russia to stop, because there will be no costs or consequences imposed on Moscow, and the return on the effort they are putting in is enormous," he said.What to do in the event of a drone threat warningLast week, Finnish authorities provided the public with updated instructions on how to act in the event of a drone threat warning.The instructions are available in English on the pelastustoimi.fi website.