Montreal police are calling on the public to help them search for a 19-year-old man who's been missing since Tuesday.
They also say Radoslaw Szalankiewicz could be suicidal, or possibly aggressive toward others, and should not be approached.
He was being evaluated at the Rosemont hospital Tuesday afternoon, but police say he left the facility before his evaluation was completed.
Szalankiewicz is 6'1", weighs 145 pounds, has short blond hair and blue-green eyes. He was last seen wearing a dark blue coat and red pants.
Police are urging people to phone 9-1-1 immediately if they spot him. They also say he could either be in Montreal or in Ottawa.