Montreal police launched a search operation on Sunday afternoon in the West Island, following reports that a bear was seen on the loose in Dorval.
Media relations officer Raphaël Bergeron said that calls came in from residents who had first seen the bear around 1 p.m.
Police began searching for the bear and alerted citizens in the area, warning them to stay inside.
Animal services were called in to help and police worked "to control the area where it was walking around."
Bergeron said that the animal has been cornered in a backyard and officials are planning to sedate it.
He said police are leaving the intervention to animal control specialists.
'It appeared all of a sudden'
William Weston, who lives on Lake Avenue in Dorval, was able to capture a photo of what appears to be a small, black bear.
"I went up to our attic floor where there's a window, trying to see if I could see it. And as I was looking into my neighbour's backyard, ... it appeared all of a sudden."
Weston said after snapping the picture, he opened the window and yelled to police about its location.
"They were frantically trying to corral it," he said. "And then I saw it go up a tree."
According to the Ecomuseum in Sainte-Anne-de-Bellevue, the bear isn't one of their animals.
They only have one bear, a spokesperson confirmed, and it's accounted for.