Dimitris Dimopoulos, 58, has been missing since Wednesday, April 19, from the area of Argyroupoli.
The alarm is activated as the missing person faces health problems, which require immediate medical attention and put his life at risk.
Dimitris Dimopoulos has a height of 1.70, gray hair and brown eyes.
On the day he went missing, he was wearing a gray jacket, gray sweatpants, an olive top and dark blue shoes, and he also wears black-rimmed glasses.
Anyone with any information is asked to contact Missing Alert by phone 24 hours a day, at the “National Hotline for Missing Adults – 1017”, at the “Tunnel”, as well as at all Police Departments in the country.