NATO joint operation interrupts Russian undersea cable cutting exercise

The Arctic Debrief is a newsletter covering the most important developments in the High North.

NATO joint operation interrupts Russian undersea cable cutting exercise

In this edition:

  • NATO joint operation interrupts Russian undersea cable cutting exercise
  • Norway detains Russian ship following docking at Svalbard
  • Ukrainian drone strikes Russian Arctic region 2,800km beyond the frontline; NATO keeps tabs on Kola Peninsula
Latest Developments

NATO joint operation interrupts Russian undersea cable cutting exercise

The frigate KNM "Thor Heyerdahl", the British frigate HMS "Northumberland" and the British logistics vessel RFA "Tiderace" patrolling the Barents Sea in 2022.

An exclusive report by Reuters reveals that a joint American, British, and Norwegian operation prevented Russian submarines from conducting an exercise meant to simulate cutting undersea communications cables.

The Russian vessels were confronted by the joint force and were unable to complete their exercise. Shortly after they left the area.

The Russian exercise was carried out by a special unit part of the "Main Directorate of Deep-Sea Research", which is dedicated to undersea espionage and sabotage and is under the direct command of the Russian defence ministry. According to anonymous Western officials cited by Reuters, the goal of the training was to "unleash a secret weapon designed to disable critical undersea cables."

No additional details have been provided on the technology deployed by the Russian vessels. However, Chinese researchers have revealed unmanned undersea vehicles capable of cutting communications cables as deep as 4 kilometres under water. This technology can be deployed from manned and unmanned submersibles.

Protection of undersea infrastructure has been an important issue for NATO as Russia intensifies its hybrid warfare against European states. Recent reports have shown the use of aerial drones, arson, and other means of sabotage targeted at disrupting communications, military assets, and industrial activities.

The cutting of communication cables is one such example of Russia's hybrid warfare with multiple incidents since 2022 where communications cables and other undersea infrastructure have been damaged. The most common method has been through the use of shipping vessels, typically part of Russia's shadow fleet, dragging their anchor along the sea floor to snatch and rip cables.

NATO's Baltic Sentry operation was established in response to the undersea infrastructure damage. This operation has NATO navies patrol the Baltic Sea for suspicious activity and to identify any vessels that may be partaking in sabotage. This has led to multiple incidents where NATO members have boarded and detained vessels suspected of conducting such activities.

The interrupted Russian exercise incident took place in April 2026 near the Svalbard archipelago, Norway's northernmost territory.

Svalbard is a network of Arctic islands belonging to Norway, however, due to the 1920 Svalbard Treaty other countries have equal rights to conduct "peaceful and economic activities" on the island. This is why a Russian mining company, Trust Arktikugol (Arctic coal), has a significant presence on the territory and maintains a settlement called Barentsburg.

Some Russian politicians claim that Russia has a right to claim Svalbard (or at least a part of it) as its own territory and advocate the use of military to seize it. This is similar rhetoric that is used when discussing Alaska and is often used to appeal to Russian nationalists.

Norway detains Russian ship following docking at Svalbard

Professor Molchanov docked at Barentsburg during a 2004 voyage to Svalbard.

Russian research vessel Professor Molchanov has been forbidden from leaving the port at Barentsburg by Norwegian authorities, with the Russian government claiming that it the action is violating the Svalbard Treaty. The ship was detained on Sept. 2.

The ship was ordered to be seized by a Norwegian court to enforce part of a $4.22 billion compensation claim won by Ukrainian state energy firm Naftogaz after the Kremlin seized the company's assets in Crimea following the region's annexation in 2014.

The claim stems from the Permanent Court of Arbitration in the Hague ruling in favor of Naftogaz in 2023. Russia has since refused to pay the claim, legal fees, and interest, leading Naftogaz to attempt to receive compensation through local courts without much success.

Svalbard's governor's office confirmed the seizure of the ship and stated that it will be held in Svalbard. While the vessel is detained, all crew and passengers—mostly consisting of scientists and a reporter with Komsomolskaya Pravda—are unaffected and "will be taken care of," according to the governer's office.

Russia responded by summoning Norway's ambassador to Russia and lodging a formal complaint. Russia's ambassador to Norway said that they will follow "legal channels" to dispute the court order.

Ukrainian drone strikes Russian Arctic region 2,800km beyond the frontline; NATO keeps tabs on Kola Peninsula

A photo taken by a local resident shows the aftermath of the drone stroke on the Novy Urengoy gas plant.

Novy Urengoy gas plant in the Yamalo-Nenets Autonomous Okrug (region) has been struck by a Ukrainian drone on Sept. 9, 2026. The northern region is about 2,800km from the Ukrainian border, marking this the deepest Ukrainian drone strike within Russia to date.

While the governor of the region claimed the drone had been shot down by air defences and the resulting damage to the plant is the result of debris, videos and photos by locals show a large fire and clouds of black smoke rising from the gas plant. The plant processes oil and gas condensate mixtures from nearby Siberian oil and gas fields.

Yamalo-Nenets is known as the gas capital of Russia as it is responsible for 74 per cent of all gas production in Russia.

Further to the West, NATO reconnaissance planes were flying near Russia's highly militarized Kola peninsula of the Murmansk Oblast (province) on Sept. 8, 2026. A Swedish Air Force Gulfstream IV Korpen, A British Air Force RC-135W British Rivet Joint, and an American US Air Force RC-135 Rivet conducted intelligence collection missions near the Russian territory which sits across from Norway on the Barents Sea.

All of these planes are equipped with real-time electronic and signals intelligence technology that intercepts, records, and analyzes enemy electronic emissions. Typically these are used to monitor enemy force movement and to identify potential threats.

While the Swedish and British planes flew around Northern Finland, the American plane flew north of the peninsula on an 11 hour mission before returning to its base in the United Kingdom. No specific news have indicated why there was a sudden increase in intelligence gathering. No news or information ties the two incidents together besides their regional proximity.

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