Firefighters have extinguished a blaze that destroyed a luxury cruiser in Sydney's Double Bay and are working to prevent any fuel spills as the boat slowly sinks.
Fire crews were called to the 40-foot cruiser at 6.22am (AEDT) on Monday after local residents reported plumes of smoke rising above the exclusive eastern suburbs marina where it's moored.
Fire & Rescue NSW Superintendent Paul Johnstone said boats either side of the cruiser were saved but suffered radiant heat damage.
He says the boat's expected to slowly sink so hazardous materials teams are working with port authority officers to set up booms to prevent fuel or oil spillages into the harbour.
Four fire trucks, a fire tug and Water Police attended the blaze.
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Detectives and fire inspectors will investigate what caused the blaze and whether it was deliberately lit.
