An alliance of aboriginals in the United Staes and Canada Wednesday warned to block the three multibillion-dollar oil pipelines that would transport tar-sands oil from Alberta to U.S..

"Indigenous people are coming together with many allies across the United States and Canada, and we will not allow these pipelines to cross our territories," said Phil Lane Jr, Lhanktonwan Dakota chief in the state of South Dakota according to Reuters.

"Along with every single legal thing that can be done, there is direct action going on now to plan how to physically stop the pipelines," said Phil Lane at a news conference in Ottawa.

Canadian natural resources Minister Joe Oliver and Saskatchewan Premier Brad Wall visited the United States earlier this month lobbying the U.S. lawmakers and industry leaders in the country to approve the controversial Keystone pipeline project that would transport tar-sands oil from Alberta to Galveston Texas, for shipment to Latin America and Europe.

However, Canada National Democrat Party Leader Tom Mulcair who was in the U.S. last week criticized Canada's environmental record and warned of job losses if the controversial pipeline project was approved.

Responding to the NDP leader's comment, Alberta Premier Alison Redford said that the NDP leader was 'irresponsible' and 'betrayed' the Canadian economic interests by undercutting its effort to get the approval of the pipeline project.

"For Mr. Mulcair to travel to Washington and undermine the months of good work by premiers of every persuasion, along with the federal government, is not only wholly irresponsible, but a fundamental betrayal of Canada's long-term economic interests," said Alison Redford.

The Keystone pipeline project got a step closer to getting approval by the Obama administration as the U.S. state department March 1 issued a draft environment impact statement saying the controversial pipeline project would not accelerate the global greenhouse gas emissions. 

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