WASHINGTON — The Pentagon’s intelligence and law enforcement arms are investigating what it says are leaks of national security information. Defense Department personnel could face polygraphs in the latest such inquiry by the Trump administration.

A memo late Friday from Defense Secretary Pete Hegseth’s chief of staff referred to “recent unauthorized disclosures” of such information, but provided no details about alleged leaks. Earlier in the day, President Donald Trump rejected reports that adviser Elon Musk would be briefed on how the United States would fight a hypothetical war with China. “If this effort results in information identifying a party responsible for an unauthorized disclosure,” then such information “will be referred to the appropriate criminal entity for criminal prosecution,” according to the memo.

At the Homeland Security Department, Secretary Kristi Noem pledged this month to step up lie detector tests.

— The Associated Press