Singapore’s Maritime and Port Authority (MPA) said on Tuesday that an oil spill that took place in the city-state’s waters during the refuelling of a ship has been contained.

About five metric tonnes of oil was spilled during bunkering operations involving the Bahamas-flagged bulk carrier Ines Corrado and a licensed bunker tanker on Oct 28, in the waters off Changi in eastern Singapore, the MPA said in a statement.

There was no oil visible at sea or ashore as of 8am (0000 GMT), it added.

The MPA said it has alerted Malaysian authorities of the spill, and also launched an investigation into the cause of the incident.