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Finland Investigates Vessel After Critical Baltic Sea Data Cable Is Damaged
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A key undersea telecommunications cable connecting Finland and Estonia was damaged in the Gulf of Finland, with the fault detected, according to Estonia’s public broadcaster ERR on December 31.
Finnish telecom operator Elisa said the incident did not disrupt services in either country due to the network’s built-in redundancy. However, the company noted that some customers using leased, direct data connections routed through the affected cable may have experienced a limited impact.
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The incident also drew a response from Finnish President Alexander Stubb, who confirmed that Finnish authorities inspected a vessel suspected of being linked to damage to underwater infrastructure in the Gulf of Finland.
Stubb thanked Finland’s Border Guard, police, defense forces, transport and communications authorities, customs service, product safety officials, and the national electricity grid operator for their coordinated response and effective communication.
Finnish authorities have inspected a vessel suspected of causing cable damage in the Gulf of Finland.
— Alexander Stubb (@alexstubb) December 31, 2025
Thank you for efficient work and communication @rajavartijat, @SuomenPoliisi, @Puolustusvoimat, @TraficomFinland, @SuomenTulli, @Tukesinfo and @fingrid_oyj. We are monitoring…
According to the President, Finnish authorities remain in close coordination with the government and continue to closely monitor developments.
“Finland is prepared for a wide range of security challenges, and we respond to them when necessary,” Stubb said.
The damage comes amid heightened scrutiny of critical undersea infrastructure in the Baltic Sea region, where cables and pipelines have increasingly been viewed as potential targets for covert or hybrid threats.
Earlier, the Swedish Navy said it was encountering Russian submarines in the Baltic Sea on an almost weekly basis and is bracing for even more activity if Russia’s war against Ukraine moves toward a ceasefire or armistice.
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