Over 200 protesters objecting to the federal government's enthusiastic support for Alberta's tar sands and the Keystone pipeline XL were arrested Monday morning as they attempted to stage a sit-in in the House of Commons.

The protesters wanted the chance to air their grievances with the environmentally reckless policies of the Harper-led Conservatives inside Parliament but were blocked from entering by fenced barricades and over 50 RCMP officers.

The protesters were encouraged by hundreds of boisterous supporters as they passed the media scrum and calmly hopped over police barricades.

WASHINGTON, DC - The iconic Canadian actors Margot Kidder and a Tantoo Cardinal were arrested Tuesday morning at 11:30 a.m. in Washington, D.C. as part of an ongoing sit-in at the White House to pressure President Barack Obama to deny the permit for a massive new tar sands oil pipeline.

"I can't think of a more important place to be," said Kidder, who is best known for her role as Lois Lane in four of the original Superman movies. "President Obama has the chance here to do the right thing and stop this pipeline. I'm here to help make sure he does it."