One woman is dead and four other people are critically injured after a nighttime explosion on a houseboat along the Utah-Arizona border.
Authorities said Thursday that a generator exploded late Wednesday night as a large group of people were vacationing on a privately owned boat on Lake Powell.
Sheriff Rick Eldredge of San Juan County, Utah, said in a statement that someone was trying to start the generator in the Crystal Springs Canyon area when it suddenly exploded.
Glen Canyon National Recreation Area spokeswoman Mary Plumb says a 52-year-old woman was killed.
She says the four injured people were flown to hospitals with broken bones, burns and facial injuries.
The National Park Service and sheriff's office are investigating.
Identities of the people involved weren't immediately released.