Pentagon announces investigation into leaks that could include lie detector tests

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 Joe Kasper referred to "recent unauthorized disclosures" of such information but provided no details about alleged leaks.

Earlier in the day, President Trump rejected reports that adviser Elon Musk would be briefed on how the United States would fight a hypothetical war with China.