UPDATE: Authorities have canceled a Silver Alert for Muskogee man who had been missing since Wednesday.
He was found safe in Anderson, Mo.
According to the alert, Alvin Lowery, 62, had been last seen about 5:30 p.m.
They were able to provide a limited description of Lowery. He is a white man wearing unknown clothing. His vehicle, however, is a red 1956 Chevrolet Nomad with the Oklahoma license plate "CHEVY56."
Lowery is a stroke victim and cannot speak.
Officials believe he is in imminent danger of serious bodily injury or death.
If you know his whereabouts or spot him somewhere, please call 911 immediately.