Moscow is threatening Finland and the Baltic states amid Ukrainian drone strikes. A crisis that is putting NATO’s air forces under pressure.
In summary
Russia is significantly ramping up its rhetoric against four NATO countries on its northeastern flank: Finland, Estonia, Latvia, and Lithuania. The core of the accusation is simple: Moscow claims that Ukrainian long-range drones are using, intentionally or not, corridors near their airspace to reach Russian targets, particularly around Ust-Luga and Primorsk. Russian authorities are now referring to direct accomplices and invoking the right to self-defense under Article 51 of the United Nations Charter. But we must be rigorous: at this stage, there is no public evidence establishing that these countries have opened their airspace to Ukraine. On the other hand, several Ukrainian drones did indeed complete their flight paths or crashed in Finland and the Baltic states after strikes toward Russia. For NATO air forces, the stakes are immediate: more alerts, more interceptions, more sensors, more ground-to-air defense, and an increased risk of military incidents in an already congested airspace.
The exact nature of the Russian warning
First, we must set the record straight on the terminology. The phrase “final warning” is widely circulating in the English-language mainstream press, but it does not exactly correspond to an established official Kremlin statement. What is established, however, is that Moscow has clearly threatened Finland and the three Baltic states, stating that if these countries knowingly allow Ukrainian drones to pass through, they would become “open accomplices in an act of aggression against Russia”. Sergey Shoigu even invoked Article 51 of the United Nations Charter to justify a potential Russian right to self-defense.
The message is therefore less a classic diplomatic ultimatum than a signal of strategic coercion. Moscow is not merely saying: we protest. Moscow is saying: if you are involved, we may consider certain responses to be legally justifiable. This is another step in the verbal escalation. And it is no coincidence. It comes after heavy Ukrainian strikes against Russian Baltic ports, notably Ust-Luga and Primorsk, which disrupted shipments of crude oil and petroleum products. Reuters reports that together, these two terminals exported nearly 50 million tons of petroleum products last year. This gives a sense of the economic and military stakes.
The operational context fueling the crisis
The background to this issue is more complex than a simple Russian accusation. For several weeks now, Ukraine has been striking Russian infrastructure related to energy and war logistics. Port facilities near Saint Petersburg have been hit on several occasions. In this context, several Ukrainian drones have strayed and entered the airspace of neighboring NATO member countries. This point, however, is not a rumor. It has been confirmed by national authorities and by Reuters.
In Estonia, the armed forces reported that drones detected over their territory appeared to be coming from Ukraine and were headed for Russia. In Latvia, debris from a drone that crashed on the territory was identified as being of Ukrainian origin. In Finland, several low-flying objects were detected in late March, and one of them was identified as a Ukrainian AN196-type drone. Two drones eventually crashed in the Kouvola region. Finland dispatched an F/A-18 Hornet on an identification mission but did not open fire due to the risk of collateral damage.
This detail is crucial. It shows that the crisis did not come out of nowhere. There have indeed been unwanted incursions or drone drifts into NATO airspace. But this does not, on its own, prove deliberate coordination between Kyiv and the countries concerned. The Baltic capitals formally deny this. The foreign ministers of Estonia, Latvia, and Lithuania have stated that their countries have never authorized the use of their territory or airspace to strike Russia. The European Commission has also spoken of unfounded allegations and disinformation.
The technical details behind the Russian accusation
To understand the accusation, one must look at how these long-range drones fly. A long-range attack drone does not always follow a clean, perfectly stable trajectory. It can be disrupted by jamming, signal loss, errors in inertial or satellite navigation, or even by route choices aimed at avoiding certain radar bubbles. In the Finnish case, Prime Minister Petteri Orpo explicitly cited Russia’s strong electronic jamming capabilities to explain a possible drift into Finnish airspace.
This is where Moscow builds its narrative. Russia maintains that these incursions are not accidental but stem either from tolerance, logistical support, or a Western inability to control the skies. Sergey Shoigu summed up the alternative bluntly: either Western air defenses are ineffective, or the states concerned are deliberately allowing it to happen. This is a politically useful line of reasoning for Moscow, but one that is fragile in terms of evidence. For in a war of long-range drones, a deviation from the flight path could also be the result of Russian jamming itself, a technical malfunction, or a navigation compromise at very low altitude.
In other words, Russia is exploiting actual incidents to construct a broader narrative: that of passive collusion by certain NATO countries. This is a political construct. It has not yet been publicly demonstrated.
The Immediate Consequences for Air Forces
For the air forces concerned, this situation changes their operational posture. The issue is no longer merely monitoring Russian aircraft in the Baltic Sea. They must now manage a more insidious, lower-flying, slower, and more confusing threat: that of the stray drone, the diverted drone, the jammed drone, or the deliberately infiltrated drone.
The first consequence is an increase in the alert burden. Every slow, small, low-flying object can trigger a reconnaissance mission, a scramble, or coordination with air traffic controllers, ground-based radars, passive sensors, and the police. This is exactly what Finland had to do with its F/A-18s.
The second consequence is doctrinal. The Baltic states have been repeating for months that the Baltic Air Policing mission is no longer entirely sufficient. This mission protects airspace, but it was originally designed for conventional violations—aircraft without flight plans, intrusions by fighter jets or reconnaissance aircraft. However, the drone threat requires a more comprehensive approach to integrated air defense, with appropriate sensors, electronic warfare, multi-layered ground-to-air defense, and more responsive rules of engagement. The joint statement by the Baltic defense ministers in late March already pointed in this direction, emphasizing the need to strengthen multi-layered air defense.
The third consequence concerns the assets deployed. NATO already has a robust surveillance and warning architecture on the eastern flank, with permanent Air Policing, IAMD, and AWACS flights. The Alliance notes that its AWACS have carried out hundreds of missions on the eastern flank in recent years, including over the Baltic and Black Seas. Since September 2025, they have also contributed to the Eastern Sentry operation. This provides detection depth, but it is not a miracle solution against slow, low-flying drones.
Finally, there is the forward presence of allied fighter jets. In mid-April, Latvia staged the arrival of two French Rafales at Lielvārde, even though these aircraft carry out NATO’s daily mission from Šiauliai in Lithuania. The message is simple: presence, responsiveness, political visibility. But no one can seriously argue that a Rafale or a Hornet, however valuable they may be, is the ideal tool to handle a diffuse swarm of slow, low-cost drones on its own.
The Strategic Risk Behind the Drone War
The real danger is not merely military. It is politico-military. Russia is attempting to create an environment where a navigation incident, a lost drone, or European industrial support for Ukraine could be reclassified as direct participation in the conflict. This logic artificially broadens the scope of “legitimate” targets. We saw this when the Russian Ministry of Defense published a list of industrial sites in Europe linked to drone production for Ukraine, before Dmitry Medvedev presented them as potential targets.
For NATO air forces, this means that four layers of risk must now be considered together.
The risk of intrusion. The risk of misidentification. The risk of escalation following an interception. And the risk of a Russian “military-technical” strike against a dual-use facility, a logistics center, a base, or drone-related infrastructure. This last point is particularly sensitive because the line between military, industrial, and technological sites is becoming blurred in this war.
We must also be clear on one point. Moscow seeks as much to deter as to overwhelm Western decision-making. Every alert consumes time, money, crews, radar resources, and political trade-offs. The battle is not fought solely in the sky. It is fought in the exhaustion of the chains of command.
The likely response of the countries concerned
Finland and the Baltic states will not back down on the substance of the issue. They will continue to deny any voluntary opening of their airspace to Ukraine, while strengthening their surveillance and response capabilities. The most likely course of action is already evident: an increase in sensors, tighter civil-military coordination, greater demand for NATO assets, denser air defense, and rules of engagement gradually adapted to non-cooperative targets.
The debate over the shift from a simple air policing mission to a mission of true regional air defense will therefore resurface with force. The Baltic states have been calling for this for months. The incidents in March and threats from Moscow only reinforce their argument.
The current sequence says something broader about war in Europe. Drones are no longer just strike weapons. They are becoming tools for diplomatic pressure, information manipulation, and tension between states. The Baltic region, which was already a zone of naval, energy, and air friction, is entering a phase where even the slowest flying object can now have disproportionate strategic effects. This is precisely what makes this issue dangerous: all it takes is a stray drone, a misinterpreted jamming signal, or a botched interception to turn a provocation into an open crisis.
Sources
Reuters, Russia says it will respond if Ukraine uses foreign airspace to attack its Baltic ports, March 31, 2026
Reuters, Stray Ukrainian drones hit Estonia, Latvia, including power station, officials say, March 25, 2026
Reuters, Finland reports territorial violation by drones, at least one from Ukraine, March 29, 2026
Reuters, Estonia says stray Ukrainian drones targeting Russia entered its territory this week, April 1, 2026
Reuters, Kremlin says Europe’s drone cooperation with Ukraine shows its growing involvement in the war, April 17, 2026
Ministry of Defense of Latvia, A drone that crashed in Latvia has been identified as of Ukrainian origin, March 25, 2026
Ministry of Defense of Latvia, Joint statement by the Ministers of Defense of the Baltic countries on drone incidents, March 27, 2026
Ministry of Defense of Finland, Suspected territorial violation by unmanned aerial vehicles in Southeast Finland on Sunday, March 29, 2026
Ministry of Foreign Affairs of Lithuania, Joint statement by the Ministers of Foreign Affairs of Estonia, Latvia, and Lithuania regarding the ongoing Russian disinformation campaign, April 10, 2026
NATO, AWACS: NATO’s eyes in the sky, updated in 2026
NATO, Strengthening NATO’s Eastern Flank, updated in 2025
TASS, Shoigu Reminds Baltic States of Russia’s Right to Self-Defense Over Drone Attacks, April 17, 2026
TASS, Medvedev Says UAV Manufacturers in Europe May Be Targeted Now, April 15, 2026
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