ORANGE COUNTY (CBSLA.com) — The Orange County Sheriff’s Department asked Monday for the public’s help in locating a man in his 70s.

Arnaldo Alvarez, who is also known as Nado, was last seen shortly before 5 p.m. Nov. 9 at his residence in the 23000 block of Via Chiripa in Mission Viejo.

READ MORE: Hart High School Investigating Threat Scrawled In Campus Restroom

Deputies said Alvarez drove his red 2009 Toyota Camry to the Costco in Laguna Niguel but never returned home. The vehicle has license plate No. 6GIE047.

READ MORE: 16-Year-Old Ricardo Ramirez Shot To Death On Compton Street

Alvarez is 5-foot-6 and weighs 180 pounds. He has gray hair and brown eyes. He was last seen wearing blue jeans and a sweater.

Deputies said Alvarez takes daily medication and left home without it. He may be in need of medical attention.

MORE NEWS: Woman Killed After Prius Slams Into Semi-Truck In Van Nuys

Anyone with information as to Alvarez’s whereabouts was asked to call Sheriff’s Department investigators at (714) 647-7055 or dispatch at (714) 647-7000.