ALBUQUERQUE, N.M. (AP) — Authorities are looking for a single-engine plane missing since it departed Moriarty, New Mexico, to Pagosa Springs, Colorado, on Friday.

FAA records indicate the plane is registered to a man with an address in Rio Rancho, an Albuquerque suburb, but it’s not known if anybody other than the pilot was aboard.

Details on the search aren’t immediately available, but Lt. Emmanuel Gutierrez of the New Mexico State Police said Tuesday it’ll be difficult to define a search area along the border between Colorado and New Mexico without more information.

That mountainous region had wintry weather over the weekend.