Monday marks opening of Montreal's first supervised injection sites

Montreal's first three supervised safe injection sites are expected to open on Monday.

Cactus Montreal confirms its site will be up and running.

Radio-Canada reports the organizations L'Anonyme and Dopamine will also open their injection sites on Monday.

They will be open about 22 hours per day, every day of the year, including holidays.

A fourth injection site is expected to open in the coming months.