The M/V Ursa Major, a Russian-flagged and operated heavy-lift ship, part of Russia’s Shadow Fleet, which mysteriously sank December 2024 in the Western Mediterranean off the coast Cartagena, Spain, was possibly sunk by a torpedo and was carrying two VM-4SG Nuclear Pressurized Water Reactors (PWR) bound for North Korea, likely to be utilized for their new class of nuclear-powered submarines, Spanish authorities have told La Verdad.