Investigation into the sinking of the Russian cargo ship Ursa Major

On December 23, 2024, the Russian cargo ship Ursa Major, also known as Sparta 3, sank approximately 60 miles off the Spanish coast following multiple explosions. The ship had departed from Russia on December 11, 2024, officially carrying 129 empty containers and two Liebherr cranes. According to media reports citing investigations, there are suspicions that the vessel was covertly transporting two VM-4SG nuclear reactors intended for North Korea. Spanish authorities documented three initial explosions near the engine room, which resulted in the death of two crew members, followed by four subsequent blasts. While official manifests listed standard cargo, analysts suggest the mission was a high-risk strategic transfer of nuclear technology between Moscow and Pyongyang. The incident occurred amidst heightened international scrutiny of military cooperation between Russia and North Korea during the ongoing conflict in Ukraine. Theories regarding the cause of the explosions range from technical failures to potential clandestine interdiction operations.