Pawnee County Sheriff's Office has issued a Silver Alert for a 61-year-old man.
Deputies say that Elvin Mills Jr. was last seen in Preston, Okla. leaving a gas station on March 8 around 12 p.m.
Mills is described as wearing blue checkered pajama pants, a t-shirt with a light blue jacket, deputies say.
Deputies say that Mills has chronic obstructive pumonary disease and did have his oxygen with him.
If you have any information on the whereabouts of Elvin Mills Jr., call Pawnee County Sheriff's Office.
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