Authorities in Malaysia intercepted an illegal diesel transfer between two tankers, highlighting the resilience of the shadow oil trade in Southeast Asia. This illicit activity continues despite major disruptions in legitimate global shipping routes.

The bust of an illegal transfer of oil between tankers in Malaysian waters has returned the spotlight to the shadow fleet trade in fuel – much of it from sanctioned nations – in Southeast Asia, which continues despite the paralysis of legitimate shipping routes triggered by the Iran war. Two tankers were intercepted in waters off Bagan Ajam, off the coast of Penang, on Saturday during an alleged illegal transfer of more than 700,000 litres of diesel worth an estimated 5.43 million ringgit...