LAKE MEAD NATIONAL RECREATION AREA, Nev. (AP) - The National Park Service says an 11-year-old Las Vegas boy who was pulled from Lake Mead late Thursday night and later died had been overcome by carbon monoxide.
Park service spokesman Andrew Munoz said Saturday that an autopsy done by the Clark County Coroner's Office determined that the primary cause of death was carbon monoxide asphyxiation, with drowning as a contributing factor.
The boy was with his parents and a sibling on a rented houseboat on the Nevada side of the lake. Munoz says it took rangers almost two hours to find the boat after the parents called 911.
A helicopter flew him to a Las Vegas hospital, but he died.
The boy's name hasn't been released. Park rangers and the Coast Guard will try to find the source of the carbon monoxide.