New U.S. Defense Secretary Pete Hegseth, in one of his first acts in the job since being appointed by President Donald Trump, has revoked the personal security detail and security clearance for Mark Milley,

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

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 is pulling the security protections and clearance of retired Joint Chiefs Chairman Gen. Mark Milley.

The Pentagon has revoked the security detail and clearance for retired general Mark Milley, a former top US military commander who has been critical of President Donald Trump. Defence Secretary Pete Hegseth directed the move as one of his first acts in office, asking officials to investigate Gen Milley's "conduct" and review his military grade.

"My family and I are deeply grateful for the President's action today," Milley said in a statement to USA Today provided by a spokesperson.

Retired Gen. Mark Milley's personal security detail and security clearance is being pulled by Defense Secretary Pete Hegseth, multiple senior administration officials tell Fox News.

Newly minted Defense Secretary Pete Hegseth stripped the personal security detail and security clearance of former Joint Chiefs of Staff Chairman Army Gen. Mark Milley on Tuesday.

The portraits of former Defense Secretary Mark Esper and retired Army Gen. Mark Milley, former chairman of the Joint Chiefs of Staff, were removed from the Pentagon after Defense Secretary Pete Hegseth revoked Milley’s personal security detail and security clearance.

Days after he was sworn into office, Defense Secretary Pete Hegseth revoked a security detail for retired Gen. Mark Milley, becoming the fourth former Donald Trump appointee-turned-critic to be stripped of protections after the president’s return to the White House.

Defense Secretary Pete Hegseth revoked Gen. Mark Milley's security clearance and detail, ordered an investigation into his conduct, and escalated tensions with the retired general, a frequent target of Trump's criticism.