EU cuts fiber optic cable

Two major undersea fiber optic cables in the Baltic Sea were cut in November 2024, raising suspicions of sabotage and prompting European security investigations.

Incident Overview

On 17–18 November 2024, two submarine fiber optic cables were disrupted in the Baltic Sea: the BCS East-West Interlink connecting Lithuania and Sweden, and the C-Lion1 linking Finland and Germany (Telia Lietuva and Cinia Oy, respectively) (Wikipedia; NetworkWorld ).

The BCS East-

West Interlink spans 218 km, while the C-Lion1 is 729 miles long, serving as a critical data route between Central Europe and the Nordic region (Wikipedia ).

Suspected Causes

European authorities and NATO member states have treated the incidents as potential acts of sabotage rather than accidental damage (NetworkWorld; CBS News ). Suspicion has focused on the Chinese cargo ship Yi Peng 3, which was present near the cables at the time of the disruptions. Western intelligence suggests the ship's anchor may have caused the damage, either accidentally or under the influence of Russian intelligence (Wikipedia; Carnegie Endowment ).

The German Defense Minister emphasized that the damage was unlikely to be accidental, highlighting the vulnerability of undersea cables to deliberate attacks (NetworkWorld ).

Security and Geopolitical Implications

Undersea fiber optic cables carry 97% of intercontinental data flows and are critical for both civilian and military communications (The Bulletin ). The Baltic Sea has become a hotspot for targeting such infrastructure, with previous incidents including the NewNew Polar Bear damaging cables and pipelines in 2023 (Carnegie Endowment ). These events underscore the growing hybrid warfare risks in Europe, particularly involving Russian and Chinese activities near NATO and EU infrastructure (CBS News; The Bulletin ).

European governments have mobilized national security agencies, including border guards, defense forces, and maritime patrols, to investigate and protect undersea infrastructure (The Bulletin ). The incidents have prompted discussions on improving surveillance, deterrence, and resilience of critical communications networks across the EU and NATO.

Broader Context

Globally, about 200 undersea cables are disrupted annually, mostly due to accidental damage from anchors or fishing equipment, but deliberate sabotage is increasingly a concern in geopolitically sensitive regions (Wikipedia ). The Baltic Sea incidents highlight the strategic importance of undersea cables and the need for coordinated international measures to safeguard them against both accidental and intentional threats.