Russian plot to sabotage undersea cables with ‘secret weapon’ foiled by NATO — clandestine op uncovers training exercise simulating deployment against infrastructure in Norway

A new report claims that NATO allies have foiled a Russian training exercise simulating the deployment of a secret weapon against undersea cables in Norway. According to Reuters, Russian subs were caught training “to unleash a secret weapon designed to disable critical undersea cables without leaving any fingerprints,” in waters near Norway’s Svalbard archipelago this spring.

The mission to uncover the plot was purportedly a joint naval exercise between Britain, Norway, and the U.S. While the mission itself was previously public knowledge, Reuters says the revelation of a new weapon in the field, the location, and U.S. involvement are all previously unknown details.

As the report notes, Norway has two 1,400km cables connecting Svalbard to the mainland, sitting at a depth of nearly 3km. The cables are the world’s largest, relaying satellite data.

The report indicates the foiled exercise was indeed a training mission, and that no cables were actually damaged. “The exercise focused on simulating the deployment of the technology in the event of a conflict with NATO,” the report claimed. An X post by the U.S. Helsinki Commission framed the report differently, claiming “Russia’s shadow war against NATO includes efforts to disable subsea cables vital for global communication. This spring, the United States, the UK, and Norway foiled an attempt to sabotage subsea cables off the Svalbard archipelago in the Arctic.”

The report didn’t provide any further details about the “secret weapon” Russia was said to be using, only that it was designed to disable cables “without leaving any fingerprints.” The report further states the op as a whole was carried out by Russia’s GUGI undersea warfare directorate.

Undersea cables are increasingly seen not only as vital infrastructure, but as potential flashpoints in geopolitical confrontations. Russia specifically has been spotted loitering over undersea cables in the UK, and one vessel tracked three Russian submarines during a monthlong exercise to survey cables.

Many territories, notably island nations, rely heavily or even exclusively on cables for their connectivity to the outside world, powering every industry including banking, defence, e-commerce, retail, and beyond.