Firefighters say welding work was behind a blaze that destroyed three boats at Ko Olina Marina on Friday, and damaged three others.
The fire started about 4 p.m., sending plumes of black smoke into the air.
A Honolulu Fire Department spokesman said the fire started when boat owners were doing welding work. Diesel absorbing pads caught fire, and the owners couldn't control the flames.
The flames were brought under control within 40 minutes, and the fire was extinguished about 5:06 p.m.
Two men were on one of the vessels when the fire started, but were able to escape without injury.
The Honolulu Fire Department said that two vessels – a 24-foot sailboat and a 36-foot motor yacht – sustained heavy damage in the blaze and subsequently sunk.
A 36-foot sailboat also sustained heavy damage, but did not sink. A man who lives on the boat was displaced by the fire.
And three other boats sustained more minor damage.
About 400 gallons of diesel fuel was on board the vessels that sank. The state and U.S. Coast Guard are overseeing the spill.
HFD estimated damage to the boats and their contents at about $200,000.
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