BILLINGS, Mont. (AP) - Environmental groups are roundly condemning recommendations for changes to some U.S. national monuments.

League of Conservation Voters President Gene Karpinski says Interior Secretary Ryan Zinke's review of the national monuments "has been a complete sham" and a pretext for "selling out our public lands and waters" to the oil industry and others.

Background: 24 national monuments threatened by Trump's executive order

Ben Schreiber, senior political strategist at Friends of the Earth, says Zinke's action is illegal and "he can rest assured that his latest giveaway to corporate polluters will be litigated in the courts."

And Jamie Williams, president of The Wilderness Society, is urging President Donald Trump to "ignore these illegal and dangerous recommendations and instead act to preserve these beloved places."

Twenty-seven monuments have been under review.

Zinke told The Associated Press he was not recommending that any be eliminated but that there would be changes to a "handful" without disclosing details.

More: Trump administration adds Oregon's Cascade-Siskyou to list of monuments under review