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Russia says magnetic mines found on tanker at Ust-Luga port

Published by Global Banking & Finance Review

Posted on May 25, 2026

2 min read

· Last updated: May 25, 2026

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Russia says magnetic mines found on tanker at Ust-Luga port

Magnetic Mines Discovered on Tanker in Ust-Luga Port

Details of the Discovery

MOSCOW, May 25 (Reuters) - Several magnetic mines had been detected on a tanker in Russia's Baltic Sea port of Ust-Luga, Russia's Investigative Committee said on Monday.

The committee said the mines, manufactured in a NATO country, were found by divers during an inspection of the hull of the tanker Arrhenius, which arrived from Belgium's port of Antwerp to load liquefied petroleum gas.

Security Measures and Response

Russia has beefed up safety measures in its ports following suspected acts of sabotage aimed at undermining its energy infrastructure.

NATO has not mined any tanker, a NATO official said in an emailed statement.

Background on Port Security

Last year, Russia ordered divers to inspect ships in its ports, after suspected attacks on four oil tankers. The Suezmax tanker Koala ran aground at Ust-Luga after a blast in its engine room in February 2025.

Information About the Tanker Arrhenius

According to LSEG ship tracking data, Arrhenius is Liberia- flagged and is managed by the Maple Mariner Holding in the UAE.

Official Statements and Investigation

A spokesperson for Russia's Investigative Committee, Svetlana Petrenko, said that the mines were produced by a NATO country. She said the vessel, which entered Ust-Luga on May 20, was scheduled to sail to the Turkish port of Samsun.

The mines were deactivated, she said.

"Based on initial investigative actions, it can already be concluded that the magnetic mines could not have been installed in Russia's territorial waters," Petrenko said.

Reporting and Editorial Credits

(Reporting by Reuters, Writing by Alessandra Prentice, additional reporting by Inti Landauro; editing by Guy Faulconbridge and Ros Russell)

Key Takeaways

  • The discovery of magnetic mines on the tanker Arrhenius highlights heightened maritime security concerns at Russian ports, particularly amid a series of prior tanker incidents at Ust‑Luga (bloomberg.com).
  • The vessel, flagged in Liberia and managed by Maple Mariner Holding of the UAE, arrived from Antwerp to load liquefied petroleum gas (LPG); the FSB and Investigative Committee attributed the mines to manufacture in a NATO country (en.usm.media).
  • This incident follows previous explosions and suspected sabotage on tankers at Ust‑Luga—such as the Koala and Eco Wizard—and has spurred mandatory underwater hull inspections at the port to counteract potential threats (maritime-executive.com).

References

Frequently Asked Questions

What was discovered on the tanker at Ust-Luga port?
Russia's FSB found several magnetic mines on the hull of the Arrhenius tanker at Ust-Luga port.
Where did the Arrhenius tanker arrive from?
The Arrhenius tanker arrived from Belgium's port of Antwerp, carrying liquefied petroleum gas.
Who manages the Arrhenius tanker?
The Liberia-flagged Arrhenius tanker is managed by Maple Mariner Holding in the UAE.
What happened to the mines found on the tanker?
The magnetic mines found on the Arrhenius tanker were safely deactivated by authorities.
Who reported on the incident at Ust-Luga port?
The incident was reported by Russia's Interfax news agency, citing the Federal Security Service (FSB).

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