VANCOUVER -- Two legal challenges were filed Friday against the federal cabinet's approval of the Northern Gateway pipeline.

The Gitxaala First Nations, who hail from the North Coast of British Columbia, filed an application for judicial review with the Federal Court of Appeal.

Ecojustice filed a separate application on behalf of ForestEthics Advocacy, Living Oceans and the Raincoast Conservation Foundation.

The environmental groups are asking for a court order quashing the approval of the pipeline proposed by Calgary-based Enbridge (TSX:ENB).

Ecojustice lawyer Barry Robinson says the federal approval was a flawed decision based on a flawed report by the federal environmental assessment panel.

The groups also want the Conservative cabinet to provide reasons for approving the project that would link the Alberta oilsands with a marine terminal on the B.C. coast.