Final Voyage: Russian Ship Heads to North Korea with Nuclear Cargo

The sinking of a Russian cargo ship has raised numerous concerns over its cargo, believed to include components for nuclear reactors destined for North Korea. The ship, known as the Ursa Major, sank off the Spanish coast on December 23, 2024, amid investigations into its actual cargo and purpose.
Key Facts of the Incident
The Ursa Major, previously named Sparta 3, departed from the fuel port Ust-Luga in early December 2024. Official records stated it was transporting:
- Two large “manhole covers”
- 129 empty containers
- Two Liebherr cranes
The cargo was supposedly bound for Vladivostok, Russia. However, Spanish maritime authorities in Cartagena found these claims implausible, given Russia’s extensive rail system. They theorized that the cranes were likely necessary for unloading critical cargo in North Korea’s Rason port.
Captain’s Testimony
After a successful rescue operation, 14 crew members were brought ashore in Cartagena. The ship’s captain, Igor Anisimov, was initially hesitant to disclose information due to safety concerns. Eventually, he revealed that the “manhole covers” contained components for nuclear reactors, though he claimed they were not carrying nuclear fuel.
Incident Details
On the day of the sinking, the Ursa Major experienced three explosions near its engine room, resulting in the deaths of two crew members. Reports indicate that a 50cm by 50cm hole was discovered in the ship’s hull, potentially caused by a Barracuda supercavitating torpedo. This type of weapon is exclusive to a limited number of nations, including the United States and Russia.
Subsequent Events
After the sinking, Russian military vessel Ivan Gren illuminated the area with flares and was followed by a series of explosion sounds detected by Spain’s National Seismic Network. Only a week later, a Russian research ship named Yantar appeared, remaining over the wreck site for several days. Four additional explosions were recorded soon after.
U.S. Military Interest
The U.S. military’s involvement has brought further scrutiny to the incident. A specialized WC-135R nuclear “sniffer” aircraft conducted two reconnaissance flights over the area. However, no radiation threats have been reported along the Spanish coast.
North Korea’s Nuclear Ambitions
The implications of the reactors’ potential transfer to North Korea are concerning, particularly given recent military cooperation between the two nations. In late 2024, North Korea reportedly deployed about 10,000 troops to support Russia in Ukraine. This partnership raises alarms in the context of North Korea’s advancing nuclear capabilities.
Evidence suggests that the reactors aboard the Ursa Major could be of the VM-4SG model, commonly utilized in Russian ballistic missile submarines. Experts warn that any transfer of nuclear technology would signal a significant shift in Moscow’s alliances and capabilities, heightening tensions in the region.

