A reward has been increased to $65,000 to locate a single-engine airplane with four people aboard that's been missing since Aug. 21 in Katmai National Park and Preserve, according to the father of one of those on board.
Three National Park Service employees -- Mason McLeod, 26, Neal Spradlin, 28, and Seth Spradlin, 20 -- were on the de Havilland Beaver when it vanished. The plane was piloted by 47-year-old Marco Alleto.
The plane was on a short flight over rugged terrain between Swikshak Lagoon and King Salmon.
Searchers found no sign of it after planes repeatedly criss-crossed the region looking for it, and last week the official search was called off.
The father of McLeod, Steve McLeod, a retired police officer who traveled to Alaska from Florida, said Monday that the reward has been increased from $15,000 to $65,000.
Anyone with information about the plane is asked to call the National Park Service at 907-246-3305, or the Alaska State Troopers at 907-246-3346.
"The families ask that you do not endanger yourselves or anyone else in your efforts to find our children," McLeod said in an e-mail Monday.