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Emergency personnel have contained an “active threat” at the University of Toronto’s Mississauga campus after students were told to shelter in place, Peel Regional Police said late Monday night.

The update came after a shelter-in-place alert from school officials warned of police activity at the McLuhan Court Residence at 3330 Residence Rd.

“Shelter in place until further instructions,” the alert said. “Emergency responders have been notified and are on scene.”

We have received reports of police activity at 3330 residence road Mcluhan Court residence at the UTM. Shelter in place until further instructions. Emergency Responders have been notified and are on scene. Please refer to UTAlerts for updates: https://t.co/QKwWfnH5IN

— U of T Mississauga (@UTM) November 3, 2026

It was unclear what prompted the response, although multiple reports said that emergency officials were dealing with an “active threat.”

In an update issued just before midnight, Peel police said no injuries had been reported and that the incident was “isolated and contained to a single residential unit in the area of Mississauga Rd. and Inner Circle on the UTM campus.

“The immediate area has been evacuated and residents are being asked to shelter in place,” the update said. “Members of the public are being asked to avoid the area.”

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The school’s campus status map said in an update at about 11 p.m. that police had confirmed that shots were fired in the area and that they had secured the surrounding area.

School officials said in a statement to the Toronto Sun that they were “aware of police activity on the University of Toronto Mississauga campus and have issued an alert to the campus community to shelter-in-place.

“Alerts will continue to be sent every 30 minutes until police deem the area safe,” the statement said, referring further comment to police.

The school’s campus status map advised students to shelter in place “until further instructions” and to keep roads, routes or walkways clear for emergency personnel.

Anyone on campus is urged to stay 30 m away from entrances to affected buildings and to not return to affected buildings until told it is safe to do so by campus security or police.

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