Nine Ontario First Nations asking for an injunction against a pair of federal and provincial bills meant to fast-track infrastructure projects revealed more details about constitutional challenges against those measures at Queen's Park on Wednesday.

Lawyers for the Indigenous groups say in a legal filing that the two laws ‘violate the constitutional obligation of the Crown’ and want both struck down

A group of Canada's First Nations has launched a constitutional challenge to recently passed laws that would fast-track approval of infrastructure projects like mines and oil pipelines, arguing the measures violate the government's obligations to Indigenous people.