"We were stunned and furious," one official told the newspaper, who had to respond to dozens of inquiries from various media outlets.
After the leak, U.S. government officials immediately asked major media outlets for information about what they planned to publish, the article said.
The leak, in particular, revealed information about Ukraine's weaknesses in the maintenance of damaged armored vehicles and the reduction in the supply of ammunition for air defense.
The New York Times wrote that Jack Teixeira, an employee of the intelligence branch of the Massachusetts Air National Guard, began "leaking" classified Pentagon documents to a Discord server in February last year.
He was officially charged under the article on seizure, storage and transfer of classified information.