Emergency crews were called to the site on Victoria Street, near Yonge-Dundas Square, at around 5:15 p.m. for reports of a "medical emergency."

A Toronto police spokesperson told Global News emergency crews were first called to the Victoria Street office, which houses a supervised injection site, at around 5:15 p.m. on Wednesday.

The Toronto Overdose Prevention Society says the decision to operate out of tents in a park in the Parkdale neighbourhood follows the provincial government's decision to put the opening of a sanctioned site in the area on hold.

"Everybody should be wary. The amount of fentanyl it takes to kill you is almost imperceptible to the eye and carfentanil is a hundred times more potent."

News of the new measures came just before Toronto police issued public safety alerts late last week in the wake of a recent spike of overdose deaths, with as many as six drug-related fatalities being recorded in the city since July 27.