Five tonnes of oil spilled while a kamsarmax bulker was taking on bunkers in the port of Singapore.
The Maritime & Port Authority of Singapore (MPA) said the overflow involving the 81,300-dwt Bahamas-flagged Ines Corrado (built 2012) and a bunker tanker began on Monday afternoon.
An MPA patrol craft sprayed dispersants and by Tuesday morning no oil was sighted at sea near the incident or ashore.