Officials say three crew members of a private firefighting company on their way to battle a New Mexico wildfire were killed when their plane crashed in heavy fog in Utah.
Police say the converted military plane was en route from Montana when it failed to clear a mountain pass by an eighth of a mile.
A U.S. Bureau of Land Management spokeswoman in New Mexico says "The fire aviation community lost good people and a valuable resource today."
The 19,000-acre blaze in New Mexico is 20 percent contained. It threatens a home, several outbuildings and a power distribution line.
Police say investigators for the Federal Aviation Administration are at the crash site and officials for the National Traffic Safety Board plan to arrive tomorrow.