Lithuania Reinforces Kaliningrad Border and Moves to Scrap Nuclear Ban After Russia’s Threats
Lithuania is sending about 100 soldiers to its frontier with Russia’s Kaliningrad region and preparing to remove a constitutional ban on nuclear weapons on its territory, as Prime Minister Mindaugas Sinkevičius cites Moscow’s broken promises over Ukraine.
Lithuania is tightening its defences on the ground and rewriting its basic law to bring NATO’s hardest deterrence tools closer.
Officials in Vilnius say up to 100 Lithuanian soldiers are being deployed to reinforce the border with Russia’s Kaliningrad region for roughly two weeks. They describe the move as preventive, citing reports of a possible Russian mobilization that could prompt people to try to cross illegally, as well as a recent incident in which armed, masked intruders entered neighbouring Latvia from Belarus and carried out sabotage. Lithuania says the situation at its own border is currently calm.
The deployment is small compared with the Russian forces stationed in Kaliningrad, but it signals that Baltic states now treat border security as part of the broader confrontation with Moscow, not just a matter of migration control.
At the same time, Prime Minister Mindaugas Sinkevičius says Lithuania is preparing to change its constitution. He explained that the constitution currently bans weapons of mass destruction on Lithuanian soil and that his government is moving to remove that article. He said the change would not mean Lithuania would acquire such weapons itself.
According to Sinkevičius, removing the ban would make it acceptable, for example, for a French submarine carrying nuclear weapons to visit a Baltic port or for an aircraft carrying nuclear weapons to fly over Lithuanian territory. At present, he said, such movements are not allowed. The adjustment would also open the way for Lithuania to join alliance nuclear arrangements if NATO decided to extend them more directly into the Baltic region.
Sinkevičius linked the shift to Russia’s record. He recalled that Russian President Vladimir Putin once said Russia would not invade Ukraine. “You can never predict what’s on their mind and how they will actually proceed. They’re talking one thing, but acting very much differently,” he said, arguing that Lithuania can no longer rely on unilateral restraints when its main adversary ignores its own public assurances.
The prime minister also pushed back against how international debate has framed his country’s geography. The Suwałki corridor, the stretch of Polish‑Lithuanian territory between Kaliningrad and Belarus, is often described as NATO’s most vulnerable choke point. Sinkevičius said the corridor is about 60 kilometres wide and “not something that narrow,” and noted that Lithuania has recently set up a military training area and facilities next to it to improve manoeuvring and logistics in a crisis.
For Lithuanians, these decisions will show up as more visible military activity near the border and a constitutional amendment process that touches on the most sensitive questions of nuclear policy. For Russia and Belarus, they offer another signal that the Baltic states intend to anchor themselves as firmly as possible inside NATO’s security guarantees.
Key developments to track include the wording and timing of the proposed constitutional amendment, any further adjustments to Lithuanian or allied force posture near Kaliningrad and the Belarusian border, and public debate inside NATO about how far nuclear‑sharing or related measures should extend toward the alliance’s northeastern flank.
Sources
- OSINT