The plane was operated by Coeur d'Alene, Idaho-based Empire Airways under contract with Memphis, Tenn.-based FedEx Corp.
The crash happened just after 4:30 a.m. Tuesday as the ATR-42 twin-turboprop aircraft was arriving from Fort Worth Alliance Arport in a freezing mist.
Officials said the plane came down at the end of the runway, veered off and caught fire. Loomis said the fire was quickly extinguished. He said weather wasn't a factor in the crash, but Munoz says the plane had skidded off the runway.
A supervisor at University Medical Center in Lubbock said the two crew members were being evaluated.