A major gas pipeline (Balticconnector) between Finland and Estonia was damaged, along with at least one submarine communications cable.
The Finnish-flagged Newnew Polar Bear was later suspected after its anchor was recovered near the damage site, though investigations are ongoing.
Undersea power and communications cables carry essential data, electricity, and economic activity across nations.
Damage — especially repeated breakages in a short period — raises concerns about intentional interference and hybrid security threats.