A plane carrying five people back from a sightseeing tour of the Grand Canyon went down Tuesday night in an area where rain and snow were reported, authorities said.
It was unclear if the plane, a twin-engine Piper Navajo Chieftain, had crashed or made a safe landing after it disappeared from radar screens at about 4 p.m. Signals were picked up from the plane's emergency locater transmitter, said Karen Whitney, a spokeswoman for the National Park Service.
Crews were searching the Mt. Wilson area, a 5,445-foot peak about 40 miles east of Las Vegas, Whitney said.
"We do not hold out a lot of hope of being able to find anything tonight," Whitney said late Tuesday.