FORT SMITH, Arkansas - Adair County Sheriff's Office has issued a Silver Alert for a 56-year-old man. Jimmy Lanier was last seen August 16 in Fort Smith, Arkansas, according to the Adair County Sheriff's Office.

A news bulletin states Lanier, an Indian male, was wearing a blue, long-sleeve shirt, blue jeans, black shoes and a brown hat with writing on top. He is under a proven medical or physical disability, authorities say.

If you know anything about Lanier's whereabouts, you're asked to call the Adair County Sheriff's Office.