UPDATE: Ngoujou was found safe and sound by police in the downtown area.
Paul Gerard Ngoujou, 17, has autism and according to police, the mental capacity of a seven-year-old child.
He does not speak, and with a cold front approaching, police are concerned for his safety.
Ngoujou is 5'9", weighs 200lbs, has brown hair and brown eyes. He is missing half of a left thumb nail, and has a birthmark on his left buttock.
Police say he understands French, and often travels between metro stations and depanneurs on foot.
He was last seen Saturday around noon at Mount-Royal park in the Ville Marie district and has not been seen since.
Anyone with information is urged to contact police at 911 or through Info-Crime Montreal at 514-393-1133.
