Emergency crews have sealed a liquid nitrogen leak at the Hospital for Sick Children.
The leak was first noticed near Bay and Dundas streets around 2:20 a.m. Monday.
The hazardous material (HazMat) team capped the leak by 4:45 a.m. The leak, located in a research lab that is under construction, was not a threat to patients or the public.
Toronto police tell CityNews an emergency valve connected to the tank broke. It has since been replaced.