NATO allies have disrupted what Western officials describe as a Russian operation involving advanced technology designed to potentially target critical undersea communications cables near Norway’s Arctic Svalbard archipelago.

According to officials cited by Reuters, British, Norwegian and U.S. forces tracked Russian vessels during an operation in the region earlier this year. Russian deep-sea units were reportedly using submersibles to simulate the deployment of technology that could be used against underwater infrastructure. No cables were damaged.

The incident has raised fresh concerns among Western governments about the vulnerability of subsea infrastructure. Two major fibre-optic cables connect Svalbard with mainland Norway and carry important satellite data, making them strategically significant for communications and scientific operations.

Norwegian Defence Minister Tore Sandvik said the joint operation sent a clear message that covert activity targeting critical infrastructure would be detected. NATO countries have increased maritime surveillance in northern European waters amid concerns over possible sabotage.

The development comes as relations between Russia and NATO remain tense because of the continuing war in Ukraine. Western officials are increasingly concerned that undersea infrastructure could become a target in a broader confrontation.

Russia has previously rejected allegations that it is preparing sabotage operations against NATO countries. The Kremlin has not accepted responsibility for the alleged activity described in the latest report.

The incident highlights the growing strategic importance of underwater cables, which carry huge volumes of global internet and financial data and have become an increasingly important part of national-security planning.