Beginning in September 2023, several undersea internet cables connecting Estonia, Latvia, and Sweden in the Baltic Sea experienced suspicious damage and outages, causing widespread internet disruptions. The breaks, notably on 17 September and again in early October, were abrupt and on multiple separate cables, raising concerns about coordinated sabotage rather than accidental damage. Investigations revealed that Estonia’s government cables suffered new damage after initial repairs, with cables severed near Latvia’s coast as well. Analysts and officials suspect deliberate Russian hybrid warfare targeting Baltic connectivity as part of an asymmetric pressure campaign. The cable cuts emerged amid heightened regional tensions and coincided with other hybrid threats in the Baltic Sea. In response, the affected nations and NATO have increased monitoring, coordination, and protection of critical undersea infrastructure. Experts emphasize the vulnerability of the Baltic states’ digital lifelines and the importance of joint resilience measures against future sabotage attempts. The events illustrate a new vector in hybrid warfare leveraging infrastructure vulnerability to destabilize NATO Baltic allies.

Beginning in September 2023, several undersea internet cables connecting Estonia, Latvia, and Sweden in the Baltic Sea experienced suspicious damage and outages, causing widespread internet disruptions. The breaks, notably on 17 September and again in early October, were abrupt and on multiple separate cables, raising concerns about coordinated sabotage rather than accidental damage. Investigations revealed that Estonia’s government cables suffered new damage after initial repairs, with cables severed near Latvia’s coast as well. Analysts and officials suspect deliberate Russian hybrid warfare targeting Baltic connectivity as part of an asymmetric pressure campaign. The cable cuts emerged amid heightened regional tensions and coincided with other hybrid threats in the Baltic Sea. In response, the affected nations and NATO have increased monitoring, coordination, and protection of critical undersea infrastructure. Experts emphasize the vulnerability of the Baltic states’ digital lifelines and the importance of joint resilience measures against future sabotage attempts. The events illustrate a new vector in hybrid warfare leveraging infrastructure vulnerability to destabilize NATO Baltic allies.