CALGARY - Calgary's Nexen Inc. and the Chinese state-owned company seeking to buy it have withdrawn and resubmitted a notice about the proposed $15-billion acquisition to the U.S. Committee on Foreign Investment.

Nexen said Tuesday that the company and its bidder, China National Offshore Oil Co., did so under "mutual agreement" with the committee.

"Discussions with CFIUS continue, with a view to completing the CFIUS review process as expeditiously as possible," Nexen said in a brief statement.

Although Nexen (TSX:NXY) is based in Canada, it has offshore holdings in the U.S. Gulf of Mexico and CNOOC said the deal requires approval from regulators in the U.S.

U.S. politicians on both sides of the aisle have cautioned Ottawa against turning over natural resources to a Chinese state-owned company. Critics fear that CNOOC may answer more to Beijing than it does to the market.

Industry Minister Christian Paradis is in the midst of deciding whether the deal would be of net benefit to Canada. The review period, which has been extended twice so far, is to end on Dec. 10, though it can be extended again with CNOOC's consent.

The Conservative government has said it will clarify its foreign investment guidelines shortly.

In an apparent bid to ease Ottawa's concerns, CNOOC has pledged to keep the head office in Calgary, seek a listing on the Toronto Stock Exchange and place some $8 billion of its assets under the control of Nexen's management in Canada.

It has also promised to carry on Nexen's social responsibility programs in Canada and around the world.

Also on HuffPost:

Loading Slideshow...
  • Celtic Exploration

    The federal government approved the takeover of Alberta-based Celtic Exploration by Texas-based ExxonMobil in February 2013. The deal was believed to be worth $3.1 billion.

  • CNOOC-Nexen Takeover

    Calgary-based energy leader Nexen is in the middle of a massive takeover bid worth more than $15-billion by China energy China National Offshore Oil Company, or CNOOC. The deal is currently being reviewed by Canadian Industry Minister Christian Paradis.

  • Petronas' Progress Energy Takeover

    Stakeholders in natural gas producer Progress Energy Resources Corp. have approved a $6-billion takeover of the company by a subsidiary of Malaysia's state-owned Petronas. Meanwhile, the company said the sale to Petronas Carigali Canada Ltd. is not being opposed by the federal government under the Competition Act, which requires major takeover deals to be of net benefit to Canada.

  • Kuwait Petroleum

    Kuwait's state-owned petroleum company, Kuwait Petroleum Corp., has reportedly signed a preliminary deal to invest as much as $4-billion in a joint venture with Athabasca Oil Corp., for an investment to develop some of Athabasca's (TSX:ATH) oilsands properties in northern Alberta.

  • Petrochina

    In 2009, Athabasca sold a 60 per cent interest in its MacKay River and Dover oilsands lands to PetroChina. In Early 2012, Athabasca exercised its option to sell the rest of MacKay River to PetroChina, making it the first oilsands operation to be fully controlled by a Chinese company.