Fire officials say a 12-acre fire that touched off after a plane crashed and exploded on Mt. Charleston has been mostly contained, with the weather helping firefighters and flames dying down.

Clark County Coroner Michael Murphy said Sunday that the four victims of the crash had not yet been positively identified, but two were males and two were females. Murphy says autopsies are scheduled for Monday morning.

A spokeswoman for the U.S. Forest Service says nearby residents who evacuated would be able to return to their homes Monday morning. Fire officials expect the fire to be fully contained by 6 p.m. Sunday.

Federal Aviation Administration spokesman Ian Gregor says the single-engine plane went down Saturday afternoon, killing all four passengers.

A preliminary investigation shows the Piper Cherokee plane was en route from the North Las Vegas airport to Byron, Calif.