CLARKSTON, Ga. — Update: Authorities said Austin Collier has been located and was found safe.

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The Clarkston Police Department has issued a Mattie's Call for a missing person who hasn't been seen in a day.

According to an alert from the Georgia State Patrol, Austin Collier was last seen around 11:30 a.m. Feb. 27 at an apartment off Post Oak Drive in Clarkston.

Authorities said Collier, 30, has been diagnosed with bipolar disorder and schizophrenia and may be off his medication.

Collier is described as a black man who is 6'1" in height and weighs 341 pounds. He has brown eyes, and short black hair.

He was last seen wearing black pants, a yellow Nike hoodie with black tennis shoes. Authorities believe Collier may be traveling on foot. 

Anyone who has seen Collier or knows where he is is asked to call Clarkston Police at 404-557-8956.

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