PASADENA (CBSLA.com) — Police sought the public’s help Tuesday to locate a 21-year-old man who has been reported missing in Pasadena.

According to the Pasadena Police Department, Nathan Naviaser was last seen around 8 p.m. on Monday at Las Encinas Hospital, located in the 2900 block of East Del Mar Boulevard.

Officers said Naviaser is being considered a missing “at risk” person as he suffers from a mood disorder and is possibly bi-polar.

Detectives described him as a Caucasian man who has brown curly hair, brown eyes, stands 5-foot-10 tall and weighs 140 pounds. He was last seen wearing a black sports coat, a black shirt, blue jeans, a black beanie and no shoes.

Anyone who is aware of Naviaser’s whereabouts has been urged to contact 911 or your local police department.