Mar-a-Lago documents kept in Trump's home were so secret that even the highest-ranking national security officials in the Biden administration weren't allowed to look at them, report says

• A new report describes the extremely sensitive nature of some documents seized from Mar-a-Lago.
• The documents held secrets about foreign countries' nuclear defenses, The Washington Post reported.

Documents recovered from former President Donald Trump's home at Mar-a-Lago were so restricted that some senior national security officials in the Biden administration did not have the authorization to look at them, The Washington Post reported.

On August 8, the FBI executed a search warrant at Mar-a-Lago in Palm Beach, Florida, and seized 10,000 government documents, including 11 sets of classified documents, court records say. According to the warrant, the FBI is investigating whether Trump broke multiple laws by taking the documents, including the Espionage Act, which prohibits the transfer of information that could harm the US.

The Post's report, citing multiple people close to the Mar-a-Lago investigation, adds to the growing concern about the sensitivity of the documents Trump kept at his home, with little known about the security of the location where they were in.

A person close to the investigation told The Post that when investigators began reviewing the documents, they grew "alarmed" at how restricted some of them were.

The Post reported that some of the documents would be unknown to most senior national security officials.

The only people with the power to grant authorization to view these sensitive documents are the president, a few members of the president's Cabinet, and officials close to the Cabinet, an unnamed source said.

Among the documents was information on the nuclear-defense capabilities of foreign nations, sources told The Post.

Additionally, 100 classified records and 48 empty folders marked "CLASSIFIED" were retrieved during the Mar-a-Lago search, according to an inventory released Friday of what was seized.

Representatives for the Justice Department, the White House, the Office of the Director of National Intelligence, and Trump did not immediately respond to requests for comment. The FBI declined to comment.