Residents on the top floor of a downtown Windsor high-rise were evacuated this morning.
Windsor fire services brought in its hazardous materials team following a report of an odor on the 16th floor at 810 Ouellette Avenue apartments.
People were asked to leave their units as a precaution and the building was later ventilated.
Residents were allowed to return home early Monday afternoon.
Police have been called in to investigate.
Fire crews were notified by a 911 call.