The contaminated bunker fuel supplied to over 200 ships in Singapore has been traced to fuel loaded onto a tanker in the United Arab Emirates, Singapore authorities have said.

The Maritime and Port Authority (MPA) said it identified the source of the contamination after conducting an investigation into the fuel purchased by Glencore and PetroChina.

Glencore had purchased the tainted fuel through Straits Pinnacle Pte, which had contracted its supply from Unicious Energy Pte, the MPA said.