On 20 May 2026, Lithuania experienced a significant security incident after a suspected drone violated its airspace, prompting widespread emergency measures. The drone, reportedly approaching from the Belarus border, triggered a Red alert in Vilnius County, forcing authorities to issue a "take shelter" warning—the first of its kind in an EU and NATO country since Russia’s full-scale invasion of Ukraine in 2022. Lithuanian President Gitanas Nausėda, Prime Minister Inga Ruginienė, and lawmakers were rushed to underground bunkers, while air traffic at Vilnius Airport was suspended and train services in the region were halted. Residents in Vilnius and border areas were instructed to seek shelter, with footage showing people taking refuge in underground parking facilities .
The incident led to criticism of Lithuania’s emergency communication systems, with Prime Minister Ruginienė publicly apologizing for failures in alert dissemination during the drone threat. Schools in affected regions were also instructed to shelter children, highlighting the severity of the response .
The European Union and NATO condemned the incident, framing it as part of a broader pattern of Russian destabilization efforts in the Baltic region. European Commission President Ursula von der Leyen stated that such threats were "unacceptable" and vowed a collective European response, emphasizing that "a threat against one Member State is a threat against our entire Union." NATO’s air policing was activated, and the alliance reiterated its commitment to Baltic security amid rising tensions . The alert was lifted after approximately an hour, allowing normal activities to resume .