Former Defense Secretary Mark Esper's security detail, which was provided by the Defense Department, was pulled Tuesday night, a U.S. official told CBS News.

The Pentagon’s inspector general will review the conduct of the former chair of the Joint Chiefs of Staff, who has been a vocal critic of the president.

Defense Secretary Pete Hegseth on Tuesday revoked the security detail and security clearance for Gen. Mark Milley, according to Pentagon spokesman John Ullyot, an unprecedented move against the former top US general who became a frequent target of President Donald Trump.

Pete Hegseth told Milley, a critic of Trump, that he had ordered an investigation to determine whether his rank should be re-evaluated.