LAWTON, Oklahoma - UPDATE: Silver Alert cancelled after Howell was found safe. 

A Silver Alert has been issued for a man last seen in Lawton. 

Reports say 64-year-old Thomas Howell was last seen at 6302 SW Lee Blvd. in Lawton around 2:45 p.m.

He is described as wearing a black shirt with blue jeans and brown shoes. 

Reports say he is under proven medical or physical disability and is in imminent danger of serious injury or death.