Liberal MP David McGuinty has offered his resignation as the Natural Resources critic to interim party leader Bob Rae Tuesday evening.

"I have offered my resignation as energy and natural resources critic to my leader, and he has accepted. I look forward to continuing to serve my constituents in the House of Commons," McGuinty wrote in a release.

McGuinty drew criticism over his remarks on Alberta Tories for their protectionist and provincial energy policies on Tuesday.

Sun Media reports that McGuinty suggest that Alberta Tory MPs in Parliament were shills for the oil industry and said that they should "go back to Alberta." He has since apologized for his comments and will continue with his duties as an MP in the Ottawa South riding.

"As Member of Parliament for Ottawa South I would like to unreservedly and unequivocally apologize for comments which I made with respect to Parliamentary colleagues from the province of Alberta," wrote McGuinty, in the release. "My words in no way reflect the views of my party or leader, and I offer my apology to them as well as my colleagues from Alberta."

Interim party leader Bob Rae apologized on McGuinty's behalf, prior to his resignation, suggesting that McGuinty's comments were out of line.

"That's why I'm saying, unreservedly and without qualification, I apologize. It doesn't reflect my views, it doesn't reflect my approach to this issue, it doesn't reflect the way in which I would address it or describe it, it doesn't reflect my view of how MPs do their job ... I think it was a mistake," said Rae.

For the time being, Rae has asked that MP Marc Garneau become the interim critic for Natural Resources, in addition to his duties as House Leader.

This is a developing story.

With files from the Canadian Press

Related on HuffPost:

Loading Slideshow...