Five people, including a 6-year-old girl, were injured in the explosion of a Saturday boat on Lake Ozarks in Missouri, authorities said.
The explosion occurred around 2:15 pm. when refueling a 1993 Chris Craft ship at the Millstone Marina gas dock, according to the Missouri State Highway Road Patrol Incident Report.
Investigators attributed the blast to a lack of ventilation and mechanical failure.
VICTIMS OF DUCK BOAT INCLUDE 9 OF ONE FAMILY, THE DRIVER OF THE SHIP, TOURISTS
The road patrol reminded sailors, in a tweet, that they needed at least four minutes "after refueling and before starting the engine to remove gasoline vapors in the hold".
The five injured were from Kansas City, Missouri, officials said.
Patrick Baber, 39, was ejected from the boat in the water, where he was saved afterwards. Carl Harris, 42, was seriously injured and was flown to a hospital.
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An ambulance led the owner and the boat's owner, Robert Baber, 71, Patrick Baber, the daughter, and a woman identified as Cynthia Sterling, 48, at a hospital.
They suffered moderate injuries. The girl, Kathryn Harris, was the only one wearing a safety device, officials said.