Montreal police sources have confirmed that a 911 call placed to police that resulted in a major police operation at the Mile End Ubisoft offices was a hoax.

Dozens of police officers were outside one of the buildings used by the tech company at the corner of St-Laurent Boulevard and St-Viateur Street on Friday afternoon, some of them heavily armed. Ambulances were also at the scene.

Specialized tactical officers evacuated the building Friday afternoon. No one was injured, and no threat was detected, police say. They say the operation began in response to a 911 call earlier Friday afternoon.

Dozens of people on the roof of the red-brick building could be seen early in the afternoon, and the door opening onto the roof was barricaded from the outside with large objects.

Police set up a perimeter around the building at the corner of St-Laurent Blvd. and St-Viateur Street. They are asking people to avoid the area.

There is an ongoing police operation at the corner of Saint-Laurent and St-Viateur. We ask people to avoid the area. The #SPVM is currently validating information and more details will follow. pic.twitter.com/44PjWzsCOh

— Police Montréal (@SPVM) November 13, 2020

Montreal Mayor Valérie Plante addressed the situation on Twitter, saying the city is in contact with police and asking people to avoid the Mile End area.

Mon équipe est en communication étroite avec le @SPVM et nous surveillons la situation de près. Nous invitons les Montréalais•es à éviter le secteur du Mile-End. #polmtl

— Valérie Plante (@Val_Plante) November 13, 2020

— CBC News