'We immediately dispatched our environmental emergency response team and cleanup efforts are underway,' Hydro One said after oil leaked into the Don River.

A Toronto real estate company is responding after a Global News report exposed a petroleum spill in the Don River that is suspected to be flowing from a nearby contaminated property.

The City of Toronto is working to determine the cause of a foul-smelling fuel spill in the Don River downtown, while a local water protection charity is criticizing the lack of government action several weeks after the spill was reported.