Honolulu firefighters were called to a boat fire on Saturday.
It happened just before 10:45 a.m. at a shipyard in Campbell Industrial Park.
Fire officials say the owner of the boat was doing some dry dock work.
No one was inside of the boat when the fire broke out and no one was injured.
One witness said he saw the flames and heard an explosion.
“The steel was buckling. You could hear that. And you could also hear secondary ancillary explosions,” said Tim Harkins, who works for the Pacific Whale Foundation.
“From the owner, the explosion was the oxygen tanks that they were using for the plasma cutters,” said Bryan Soares, acting battalion chief at the Honolulu Fire Department.
Plasma cutters are tools used to cut metal. When used, they send out sparks.
Fire officials say those sparks may have hit some foam material on the boat, and that’s what may have stated the fire.
The exact cause of the fire is still under investigation.
Damage to the boat is estimated at $250,000 to $300,000.