BOZEMAN, Montana Interior Secretary Ryan Zinke recommended Thursday that President Donald Trump weaken protections for a number of national monuments, but he also opted to keep secret specific details about the proposed changes.

Zinke told The Associated Press he is not asking for any monuments to be eliminated. Some, however, appear headed for drastic reductions.

In April, Trump sparked outrage when he signed a pair of executive orders threatening 27 national monuments most famously, the 1.35 million-acre Bears Ears National Monument in southern Utah. Those orders tasked the departments of Interior and Commerce with reviewing recent land and marine national monuments designated or expanded under the Antiquities Act , which was signed into law by President Theodore Roosevelt in 1906.

Bears Ears named after a pair of buttes and home to thousands of Native American archaeological and cultural sites could be reduced by 88 percent , to just 160,000 acres, The New York Times reported Friday, citing people familiar with the report.

Zinke submitted his monuments review to the White House on Thursday, though the full report has not been made public. The White House told HuffPost the report wont be made available until a draft is finalized in the coming weeks.

The recommendations I sent to the president on national monuments will maintain federal ownership of all federal land and protect the land under federal environmental regulations, and also provide a much needed change for the local communities who border and rely on these lands for hunting and fishing, economic development, traditional uses, and recreation, Zinke said in a statement.

Zinke did not specify any monuments in the 1,045-word summary that was released; however, The Washington Post reported that the recommendation calls for shrinking at least three monuments , including Bears Ears, Grand Staircase-Escalante, also in Utah, and Oregons Cascade-Siskiyou National Monument. And the New York Times reported at least four monuments are on the chopping block.

The report summary criticized the use of the Antiquities Act to preserve natural habitats and the historic sites such as World War II weapons testing grounds.

While early monument designations focused more on geological formations, archaeological ruins, and areas of historical interest, a more recent and broad interpretation of what constitutes an object of historic or scientific interest has been extended to include landscape areas, biodiversity, and view sheds, Zinke wrote in the summary. Moreover, features such as World War II desert bombing craters and remoteness have been included in justifying proclamations.

The briefing acknowledged that the vast majority of the 2.4 million public comments received by the Interior Department favored maintaining the current size of all monuments, demonstrating what the agency called a well-orchestrated national campaign organized by multiple organizations.

In an interview with AP in his home state of Montana where he is traveling for an on-site briefing about ongoing wildfires Zinke did not disclose specific boundary changes and dismissed the idea that the administration is looking to sell off Americas public lands.

Ive heard this narrative that somehow the land is going to be sold or transferred, Zinke told AP. That narrative is patently false and shameful. The land was public before and it will be public after.

In June, Zinke recommended Trump shrink Bears Ears boundaries . Instead of the large area designated by former President Barack Obama , it would have been more appropriate to identify and separate the areas that have significant objects to be protected, Zinke wrote in June.