The Natrona County Sheriff's Office has deployed cadaver dogs to search for the man who reportedly fell from a boat while fishing at Alcova Reservoir on Saturday evening, Sheriff's investigator Taylor Courtney said Friday.

"Most likely he's deceased," Courtney said. "So that's why we called in the cadaver dogs."

The sheriff's office was notified regarding the incident about 7 p.m. Saturday.

Natrona County crews began their search then, and officials from Sublette County arrived to continue the search on Monday.

The public is asked to avoid the Fremont Canyon area during the search.