Contaminated very low-sulphur fuel oil (VLSFO) first discovered in Houston has reportedly spread to Singapore, a top bunker fuel testing company has warned.

Two unnamed vessels are said to be the latest ships to have received contaminated fuel during bunkering operations in the city-state, according to an alert by VPS.

The global market leader in marine fuel testing and bunker surveys first reported that its fuel testing arm discovered a marine fuel contamination issue in Houston in early July 2023.