The survivor of yesterday's fatal boat fire off the Cork coast has revealed that those on board tried to fight the blaze before abandoning the vessel.

Fire aboard cruiser off west Cork coast

Three men died in the fire that sank a motor cruiser off the west Cork coast.

It is understood investigations will examine whether the blaze was started by an electrical fault or a gas explosion.

Post mortem examinations were to take place today on the bodies of three men who died.

Watch video footage from the scene

The three dead men have been named locally as Richard Harman from Glengarriff and Germans Mike Schmidt, who lived in Glengarriff, and Wolfgang Schroder, who lived in Bantry.

The men were taken from the water by helicopter and declared dead at Cork University Hospital.

The survivor, 46-year-old Ed Dzito, who is originally from Connecticut, was treated at Bantry General Hospital and discharged this morning.

The four men had been on a fishing trip when a fire broke out on board the 25ft cruiser 'Castaway' near the Roundcarrig Lighthouse off the coast of Adrigole at around 5.30pm yesterday.

The Marine Casualty Investigation Board and Bantry gardaí have begun separate investigations into the cause of the blaze.

No distress message was sent from the vessel.

Captain Darragh Fitzpatrick, the pilot of the helicopter, said Mr Dzito could say little when he was pulled from the water.

Speaking on RTÉ Radio's Morning Ireland, local Cllr Noel Harrington said the community is in shock.