Lithuania's president and prime minister were forced to take shelter on Tuesday, when a drone alert caused the capital Vilnius to come to a standstill.
President Gitanas Nauseda and Prime Minister Inga Ruginiene were taken to emergency shelters following the air alert, which ordered the city's population to take cover.
Flights were suspended and road and rail travel briefly ground to a halt. The alert has since been lifted. It is not yet clear who was behind the incursion.
It came a day after Estonia said NATO shot down a drone over its territory, which it suspected was a Ukrainian projectile knocked off course by Russian electronic interference.
The latest incident highlights a series of recent drone incursions over NATO members Estonia, Latvia, and Lithuania, with Lithuania's defence ministry issuing an alert that advised residents to seek shelter.
While officials have not confirmed the drone's origin, Lithuania's military stated that NATO jets were deployed to locate and potentially engage the threat but were unsuccessful. The alert prompted an evacuation order at the Seimas, Lithuania's parliament, where politicians and staff were led to basement shelters.
No damage has been reported from the drone incidents, but they raise serious concerns about security in the region, especially following earlier allegations that Ukrainian drones have entered Baltic airspace due to electronic jamming by Russia.
In response to rising tensions, officials in the Baltic states have condemned accusations from Moscow, affirming their sovereignty and rejecting claims of complicity in drone incursions into Russia.
