Russian drone spillover stokes fears across NATO's northern flank

Drones crossing into Finland, Estonia, Latvia and Lithuania are pushing the Ukraine war toward NATO’s northern border, turning a battlefield spillover into a test of air defenses, civilian nerves and political resolve. The pattern has unsettled governments from Helsinki to Vilnius because even a small unmanned aircraft can trigger a military response, disrupt airports and force officials to decide whether they are seeing error, jamming or a hostile probe.

The first alarms in the timeline came on March 23 to 25, when drones were reported over Lithuania, Estonia and Latvia. On March 25, one drone hit a chimney at Estonia’s Auvere power station and another crash-landed in Latvia. Lithuania had already reported a Ukrainian drone crashing into a lake, setting the tone for a month in which border airspace became part of the daily security conversation rather than a distant front.

Finland then moved the stakes higher. On March 29 and 30, it reported a suspected territorial violation by unmanned aerial vehicles in the southeast and scrambled F/A-18 fighter jets. One object over Finland was identified as a Ukrainian AN-196 drone. Prime Minister Petteri Orpo said Russian electronic jamming could explain why drones drifted into Finnish airspace, while the Finnish air force said the pilot did not open fire to avoid collateral damage. One drone fell north of Kouvola in eastern Finland, and another landed in the same region.

The pressure did not ease. On March 31 and April 1, Estonia and Latvia detected more foreign drone activity near their borders, and Estonia later found debris in Tartu County. Estonia’s armed forces said the drones appearing in the country seemed to have come from Ukraine and been intended for Russia, a reminder that the distinction between a misdirected weapon and a deliberate provocation depends on intent, trajectory and the role of electronic warfare.

By May 7, Latvia and Lithuania were calling on NATO to strengthen air defenses after two suspected stray drones crossed from Russia into Latvia. One exploded at an oil storage facility in the Rēzekne region and damaged four empty oil tanks. The political shock spread fast. Latvia’s defense minister, Andris Spruds, resigned on May 10, and Prime Minister Evika Silina resigned on May 14, collapsing the coalition government after the Progressives party withdrew support.

The danger to civilians became immediate on May 15, when Finnish authorities warned 1.8 million people in the wider Helsinki region to stay indoors because of suspected drone activity and suspended air traffic at the capital airport while scrambling fighter jets. Then on May 21, Lithuania and Latvia each detected drones in their airspace and NATO fighter jets scrambled again, while Latvia said additional units had been deployed on the eastern border with Russia.

Ukraine’s stepped-up long-range attacks on Russian Baltic Sea oil shipping ports such as Primorsk and Ust-Luga are feeding the spillover. For NATO’s northern flank, the warning is blunt: a drone that drifts off course may be an accident, but repeated crossings, airport shutdowns and explosions near critical infrastructure are beginning to look like a new and far more dangerous kind of pressure.