The information shows that the United States was aware of impending events in Russia

American intelligence officials briefed senior military and administration officials on Wednesday that Yevgeny Prigozhin, the leader of the mercenary Wagner Group, was preparing to take military action against senior Russian defense officials, according to officials familiar with the matter.

U.S. spy agencies had indications days earlier that Mr. Prigozhin was planning something and worked to refine that material into a finished assessment, officials said.

The information shows that the United States was aware of impending events in Russia, similar to how intelligence agencies had warned in late 2021 that Vladimir V. Putin was planning to invade Ukraine.