Montreal police are asking for the public’s help to find a missing 19-year-old man who could also be in Ottawa.

Montreal Ottawa Missing Man Radoslaw Szalankiewich

Montreal police say to call 911 if you see Radoslaw Szalankiewich. (Courtesy Montreal police)

They said Radoslaw Szalankiewich left a hospital in Montreal’s Rosemont neighbourhood before his evaluation was finished Monday afternoon.

It’s believed he’s either in Montreal or Ottawa.

He is described as a white man around six feet one inch tall and weighing around 145 pounds with blonde hair and hazel eyes.

Montreal police are warning anyone who sees Szalankiewich to not approach him, because he could become aggressive.

Police said given the man's history, he could also be suicidal.

Anyone who sees him is asked to call 911.