Drone Attacks in Baltic Airspace Intensify Pressure on NATO

The Russian-Ukrainian conflict, which began in February 2022, continues to take on new dimensions at the transnational level. On multiple occasions in recent months, Ukrainian drones have been detected in the airspace of various European countries—particularly the Baltic states, such as Estonia, Latvia, Lithuania, and Finland—raising concerns among the authorities of those countries.

In recent months, Ukraine has expanded its long-range attacks against strategic Russian targets near the Baltic Sea, including military and energy facilities. On May 15, 2026, for example, a Ukrainian drone attack crossed Finnish airspace, triggering a significant security alert in the Uusimaa region, located in the southern part of the country. On that occasion, Ukrainian drones loaded with explosives were launched toward the area, triggering an alert that affected approximately 1.8 million people and leading to a complete shutdown of air traffic at Helsinki-Vantaa Airport.

In Lithuania, a similar incident occurred, also in May of the same year. At the time, authorities issued a nationwide alert regarding a possible aerial threat after detecting drones near the border with Belarus. Sirens were sounded in the country’s capital, the population was instructed to seek shelter, and the capital’s airspace was temporarily closed. President Gitanas Nausėda, Prime Minister Inga Ruginienė, and members of parliament were escorted to safe locations.

In Latvia, meanwhile, the aerial incursions contributed to exacerbating the country’s already unstable political situation. Also in May 2026, three Ukrainian drones entered Latvian airspace, and one of them even caused an explosion at an empty fuel depot near the city of Rēzekne. Authorities later admitted that air surveillance systems had failed to detect the aircraft in time. Against this backdrop, then-Latvian Prime Minister Evika Siliņa came under intense political pressure following criticism of her handling of the crisis and the government’s delay in clarifying the origin of the drones. In an attempt to stem the political fallout, Siliņa dismissed the defense minister, which led to the collapse of the governing coalition. Without a parliamentary majority and facing a motion of no confidence, the prime minister announced her resignation on May 14, 2026.

In addition to these incidents, another attack, which occurred on May 29, 2026, involved a drone that struck a residential building in eastern Romania, near the border with Ukraine, causing a fire and injuring two people. Following the incident, the Romanian government claimed that the drone was of Russian origin and was also being used in attacks against Ukrainian territory, asserting that Russia was responsible for constant violations of the country’s airspace. However, these allegations come amid recurring accusations of Ukrainian drones violating the airspace of the Baltic nations.

In contrast, the spokesperson for the Russian Ministry of Foreign Affairs, Maria Zakharova, stated that the outcry from other Western countries over the attack was being used to divert attention from the May 22 Ukrainian drone strike on the Starobelsk Vocational College, located in a Russian-occupied region, which killed 21 students and injured another 65. At the time, when asked about the incident in Romania, Zakharova stated that Russian involvement had not been properly substantiated with concrete evidence, and she also emphasized that the attack on Starobelsk had been directly funded by European Union countries.

Incidents involving Ukrainian drones in the territory of NATO member countries increase the risk of the war spilling over beyond Ukraine’s borders. Although these episodes do not, as of yet, constitute a deliberate attack against the alliance, they raise questions about the possibility of more direct NATO involvement and about the consultation mechanisms provided for in its founding treaty.

Concerns have been growing, especially in the countries on the organization’s eastern flank. Latvia and Lithuania have been pressuring NATO to strengthen its air defense capabilities following successive drone incursions into their territories. Similar incidents have also been reported in Romania and Estonia, highlighting that the problem is no longer exclusively Ukrainian and has come to directly affect the security of alliance members.

In one such incident, a Ukrainian drone flying over Estonia was shot down by a Romanian F-16 fighter jet operated by NATO. Kyiv later classified the incident as unintentional and issued a formal apology. Ukrainian officials claim that many of these drones are “electronically hijacked” by Russian electronic warfare systems, causing them to veer off their original course and end up entering allied airspace.

Moscow, for its part, offers a different interpretation of the events. Russian officials have accused NATO countries of allowing Ukraine to use their territories and airspace to conduct operations against Russian targets. The tone of the statements intensified after the Russian Foreign Intelligence Service (SVR) alleged that Latvia was preparing its territory to support Ukrainian drone attacks. In response, the agency warned that NATO membership “will not protect accomplices of terrorists from just retaliation.”

The increase in the frequency of these incidents has also sparked internal debates within the alliance. According to NATO officials, measures are being evaluated to optimize the network of sensors and interception systems in Eastern Europe, including broader integration of anti-drone capabilities under the organization’s coordination. Romania has requested additional equipment, such as specialized radars capable of detecting drones flying at low altitudes.

Romania’s concern is not limited to immediate defense. The Romanian government intends to bring the issue up for discussion among allies and advocate for strengthening deterrence and defense capabilities on NATO’s eastern flank. Experts argue that the rapid technological evolution of drones used in conflict has made it difficult for Western defense systems to adapt, creating an environment of growing vulnerability.

In this context, some alliance members have already invoked Article 4 of the North Atlantic Treaty in similar situations. Poland and Estonia invoked the mechanism following violations of their airspace, allowing for formal consultations among allies regarding threats to collective security. Romania, however, has not yet confirmed whether it will follow the same path.

Although Article 4 does not imply an immediate military response, its eventual invocation would demonstrate that the impacts of the war have already crossed Ukraine’s borders and are now directly affecting the security perceptions of NATO members. Thus, the series of incidents involving drones represents not only an operational challenge for the alliance’s air defenses but also a potential factor in political and strategic escalation between Russia and the Western bloc.