Malaysia Detains Two Tankers for Illegal Diesel Transfer

On April 11, 2026, Malaysia's Maritime Enforcement Agency (MMEA) detained two tankers off the coast of Penang for allegedly conducting an illegal ship-to-ship transfer of approximately 700,000 liters of Euro 5 diesel. The operation was initiated following an intelligence tip-off regarding suspicious activities involving the vessels anchored near Bagan Ajam. The total amount of diesel seized was estimated at around 800,000 liters, valued at approximately 5.43 million ringgit (about $1.37 million).

Malaysia: Two tankers detained over illegal ship-to-ship transfer of diesel off PenangMalaysia Detains Two Tankers for Alleged Illegal Diesel Transfer off PenangThe Straits TimesMMEA seizes two tankers, thwarts illegal diesel transfers worth RM2.33 billion

Penang MMEA director Muhammad Suffi Mohd Ramli reported that the inspection revealed both ships were coupled together, suspected of unauthorized oil transfer activities. The operation led to the arrest of 22 crew members, comprising nationals from Malaysia, Myanmar, Russia, the Philippines, and Indonesia. The MMEA did not disclose the origin of the tankers or the intended destination of the diesel.

Malaysia Detains Two Tankers for Alleged Illegal Diesel Transfer off PenangThe Straits TimesUsNews and World ReportSouth China Morning Post

Malaysia has been intensifying its crackdown on fuel smuggling amid rising shortages and supply disruptions attributed to the ongoing conflict in the Middle East. The waters off Malaysia are notorious for illegal ship-to-ship transfers, a method often employed to obscure the origin of oil. In July 2025, Malaysian authorities announced stricter enforcement of regulations to combat such maritime offenses.

The Straits Times

The case is being investigated under Section 491B(1)(k) of the Merchant Shipping Ordinance 1952, which prohibits conducting ship-to-ship transfers without the permission of the Director-General of the Marine Department of Malaysia. Violations of this law can result in fines of up to 200,000 ringgit for each vessel. Additionally, investigations are underway under the Customs Act 1967 for failing to produce necessary documentation related to the oil transfer and cargo declaration.

MMEA seizes two tankers, thwarts illegal diesel transfers worth RM2.33 billion

While the MMEA's actions have been praised for addressing illegal fuel transfers, some critics argue that the enforcement measures may not be sufficient to deter ongoing smuggling activities. The effectiveness of the crackdown remains a topic of discussion among maritime experts and local stakeholders.

MMEA seizes two tankers, thwarts illegal diesel transfers worth RM2.33 billion

The MMEA has indicated that it will continue to enhance patrols and surveillance in Malaysian waters to prevent illegal fuel transfer activities. The outcome of the ongoing investigations and any potential legal actions against the detained crew members and vessels will be closely monitored.

MMEA seizes two tankers, thwarts illegal diesel transfers worth RM2.33 billion

• “The inspection found that both ships were in a coupled state and were suspected of carrying out ship-to-ship oil transfer activities without permission,” — Muhammad Suffi Mohd Ramli, Director, Penang MMEA

The Straits Times

• “He described the case as one of the highest-profile maritime seizures recorded this year.” — Muhammad Suffi Mohd Ramli, Director, Penang MMEA

MMEA seizes two tankers, thwarts illegal diesel transfers worth RM2.33 billion

• “MMEA said it will continue to intensify patrols and surveillance in Malaysian waters to curb illegal fuel transfer activities at sea.” — Muhammad Suffi Mohd Ramli, Director, Penang MMEA

MMEA seizes two tankers, thwarts illegal diesel transfers worth RM2.33 billion