Full Breakdown
Magnetic Explosives Discovered on LPG Tanker Arrhenius at Russia’s Ust-Luga Port
5/26/2026, 12:42:43 AM
Incident Overview
On May 20, 2026, the Liberian-flagged liquefied petroleum gas (LPG) tanker Arrhenius entered the Baltic Sea port of Ust-Luga in Russia’s Leningrad region to load cargo from Antwerp, Belgium. During a routine hull inspection, divers reported finding magnetic devices attached near the engine room. The devices were later deactivated and removed.
Background & Security Context
Russia has intensified inspections of vessels after a series of suspected sabotage incidents targeting its energy sector. In February 2025, the Suezmax tanker Koala suffered a blast in its engine room after running aground at Ust-Luga. In 2025, four oil tankers were allegedly attacked, prompting authorities to order divers to examine ships entering Russian ports.
Key Actors
- Arrhenius – Liberia-flagged LPG tanker, managed by Maple Mariner Holding (UAE).
- Russia’s Investigative Committee – represented by spokesperson Svetlana Petrenko.
- Federal Security Service (FSB) – Russian security agency that issued a statement on the incident.
- NATO – Denied any involvement in the placement of the devices.
Data & Statistics
- The devices were described as “magnetic mines” by the Investigative Committee and “magnetic explosives” by the FSB.
- Each device contained approximately 7 kilograms (15 pounds) of plastic explosive; the total number of devices was not disclosed.
- The Arrhenius was scheduled to depart Ust-Luga for the Turkish port of Samsun after loading.
Official Statements & Responses
The Investigative Committee asserted that the mines were manufactured in a NATO country and that “the magnetic mines could not have been installed in Russia’s territorial waters.” The FSB characterized the find as a thwarted “terrorist attack,” emphasizing that the explosives were deactivated. A NATO official, responding by email, stated that NATO “has not mined any tanker.” Russian authorities indicated that the incident prompted further safety measures in the port.
Criticism & Opposition
NATO’s denial directly challenges the Russian claim of a NATO origin for the devices. No independent verification of the mines’ provenance or installation site has been presented, leaving the attribution contested.
Conflicting Reports & Gaps
- Origin: Russian officials attribute the devices to a NATO-manufactured source; NATO refutes any involvement.
- Device Count: The exact number of magnetic explosives recovered remains unspecified.
- Installation Location: While Russian investigators suggest the devices were placed outside Russian waters, the precise location and method of attachment are unclear.
Verbatim Quotes
- “Based on initial investigative actions, it can already be concluded that the magnetic mines could not have been installed in Russia's territorial waters,” — Svetlana Petrenko, Investigative Committee
- “A spokesperson for Russia's Investigative Committee, Svetlana Petrenko, said that the mines were produced by a NATO country.” — Svetlana Petrenko
- “Divers discovered foreign magnetic objects attached near the engine room that showed signs of being explosive devices,” — FSB
What’s Next
Russian authorities plan to continue comprehensive inspections of vessels docking at Ust-Luga and to investigate the supply chain of the magnetic devices. Diplomatic channels may be engaged to address the dispute over the alleged NATO involvement.
