A Norwegian military aircraft, used for monitoring Russian submarines, made an emergency landing at Evenes Airport.

Britain deployed military vessels to deter potential attacks on undersea cables and pipelines by Russian submarines, which had been present in and around British waters for over a month.

Belgium is preparing its response to a potential arrival of Russian submarines in the North Sea, viewing it as a critical security vulnerability.

European naval chiefs are leading NATO's Arctic drills, which are aimed at Russian submarines and intended to demonstrate Europe's commitment to defense to President Trump.

High-tech Russian submarines, under President Putin's command, are reportedly challenging NATO deep below the Atlantic Ocean.

Ireland is planning to transform its Naval Service into a modern military force capable of hunting Russian submarines, moving from a 'token navy' to a more robust defense capability.

Russian diesel-electric submarines stationed at the Kronstadt naval base near St. Petersburg have been observed with new equipment designed to protect against drones, indicating a growing threat from Ukrainian unmanned aerial vehicles.

The United Kingdom's military has reportedly tracked three Russian submarines conducting what is described as a covert operation within British waters.

The French frigate Aquitaine was honored by the US Navy for its excellence in anti-submarine warfare, after patrolling the North Atlantic and Baltic Sea last year to monitor Russian submarines.