In November 2024, two major submarine fiber optic cables in the Baltic Sea—the BCS East-West Interlink and C-Lion1—were cut, causing significant disruptions and raising suspicions of deliberate sa...
On 17–18 November 2024, the BCS East-West Interlink (connecting Lithuania and Sweden) and the C-Lion1 cable (linking Finland and Germany) were severed in the Baltic Sea . The cables were cut within 60–65 miles of each other, suggesting a coordinated event rather than accidental damage . The BCS East-West cable, at a depth of 100–150 meters, carried about one-third of Lithuania's internet capacity, while the C-Lion1 cable, at 20–40 meters deep, is the only direct link between Finland and Central Europe .
Authorities suspect deliberate sabotage, potentially linked to geopolitical tensions in the region. A Chinese cargo ship, Yi Peng 3, was present near the cables at the time, and Western intelligence officials have speculated that its anchor may have caused the damage, possibly under Russian influence . Similar incidents in the Baltic Sea, including the Estlink 2 cable disruption and previous pipeline damages, indicate a pattern of targeting undersea infrastructure as part of hybrid warfare .
The cable cuts disrupted telecommunications and internet services in affected countries, though global internet traffic remained largely resilient due to network redundancy . Repairing the C-Lion1 cable was estimated to take five to fifteen days, highlighting the vulnerability of critical undersea infrastructure . These events underscore the strategic importance of submarine cables, which carry 97% of intercontinental data flows and are vital for both civilian and military communications .
The Baltic Sea has become a hotspot for attacks on critical infrastructure, with NATO and European nations closely monitoring undersea cables . While no party has been conclusively blamed, the incidents have intensified concerns about Russia and China potentially using undersea sabotage as a tool of hybrid warfare . The events have prompted discussions on improving security, monitoring, and protection of submarine communication networks across Europe .
The cutting of the BCS East-West Interlink and C-Lion1 cables highlights the vulnerability of Western Europe's undersea fiber optic infrastructure. While investigations continue, these incidents serve as a reminder of the strategic importance of submarine cables and the need for enhanced security measures to protect critical communications from potential sabotage .
Cables affected by September 6 cuts Major cables impacted include South East Asia–Middle East–Western Europe 4
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