BOULDER CITY -- A Las Vegas man has died while scuba diving at Lake Mead National Recreation Area.
Authorities say the victim was unresponsive Saturday when he surfaced while diving with a group in the Kingman Wash area on the lake's Arizona side.
Efforts to revive him failed, and the cause of death wasn't immediately known.
The victim's name wasn't immediately released.
The National Park Service and Clark County Coroner's Office are investigating the 9:45 a.m. death.