A Malaysian-registered tanker, MT Bunga Kelana 3, collided with a bulk carrier in the Singapore Strait about 13km southeast of Changi East this morning.
The Maritime and Port Authority of Singapore (MPA) said the tanker collided with a St Vincents and The Grenadines-registered bulk carrier, MV Waily, in the traffic separation scheme (TSS) in the strait at about 6.10am.
In a statement, the MPA said there was no report of injury to crew members but the tanker suffered damage to one of its cargo tanks, resulting in an oil spill.
The master of the tanker estimated that 2,000 tonnes of crude oil could have spilled into the sea.
Both vessels are currently anchored in the Singapore Strait, with the MV Waily currently about 11 km southeast of Changi East and the MT Bunga Kelana 3 about 7km south of Changi East.
The MPA Port Operations Control Centre had issued navigational broadcasts to ships transiting the TSS to keep clear of the anchored vessels.
Traffic in the TSS remains unaffected.
Te MPA had also activated oil spill response companies, which had deployed three craft with oil spill equipment.
Work is ongoing to contain and clean up the oil spill.
The MPA had also informed the Malaysian and Indonesian authorities of the incident, the statement added.