CARIBOU COUNTY, Idaho -

Authorities in two states are looking for a missing man.

Philip Lee Gibson, 23, was last seen in the Casper, Wyo. He is a white male, 5-foot-8, about 145 pounds with blue eyes and blond hair.

According to a news release from the Caribou County sheriff, Gibson is driving a black 2003 GMC crew cab pickup with various chrome accessories. The truck bears the Idaho registration 3C2975T.

The sheriff's office did not release further information on Gibson's disappearance.

If you have knowledge of Gibson's whereabouts, call Caribou County Sheriff's Office at (208) 547-2561 or the Natrona County, Wyo., Sheriff's Office at (307) 235-9282.