Poland has reinforced security along its border with Russia’s Kaliningrad exclave after intelligence warnings of potential sabotage and incursions by armed individuals in the first half of November, Prime Minister Donald Tusk said Tuesday. Tusk said Border Guard officers reported suspicious movement overnight involving people with flashlights near the frontier. Security forces responded quickly, and he said they may have prevented a provocation, although the individuals’ intentions remained unclear. The operation involves police, border guards, counterterrorism officers and soldiers in northeastern Poland. Military special forces personnel have also been deployed as part of the operation. Poland, a member of NATO and the European Union, has repeatedly warned of Russian sabotage and other covert activity since Moscow’s full-scale invasion of Ukraine in 2022. The latest deployment followed intelligence warnings of possible sabotage and border incursions received by Polish authorities. Tusk warned that Poland could face a prolonged escalation from Russia and called for heightened vigilance against sabotage and other threats.