WASHINGTON (TNND) — Senior U.S. military officials, including top leaders, were subjected to polygraph tests as part of a sweeping investigation into leaks of classified information about U.S. weapons stockpiles, according to sources familiar with the matter.

Several dozen people were tested earlier this summer, including officials from U.S. Central Command and other combatant commands. The polygraphs focused on whether officials had provided sensitive national security information to journalists. Sources told CBS News that no one failed the leak-related questions.

WASHINGTON, DC - MAY 12: U.S. Secretary of War Pete Hegseth testifies before the Senate Appropriations Committee on the FY2027 budget request in the Dirksen Senate Office Building on Capitol Hill on May 12, 2026 in Washington, DC. The Trump administration is asking for an unprecedented $1.5 trillion for the Pentagon, an increase of 50-percent over last year's budget. (Photo by Chip Somodevilla/Getty Images)

Officials said the unusually large number of polygraphs reflected the scale of the investigation, even as such tests are routinely used to maintain some high-level security clearances.

The reported leaks involved concerns about the rapid use of some of the U.S. military’s advanced, limited-supply munitions during the war. President Donald Trump was reportedly angry over the leaks, and one source said officials considered whether someone with access to the information could be working for foreign intelligence.

Joint Chiefs Chairman Gen. Dan Caine was not among those polygraphed, according to a senior Pentagon official.

Defense Secretary Pete Hegseth announced in July that the Pentagon and the Justice Department had formed a joint task force to identify and prosecute suspected leakers. Hegseth also authorized the Pentagon’s Office of General Counsel to seek records and assistance for leak investigations, with personnel directed to prioritize requests within two days.

Pentagon spokesman Sean Parnell said the department takes leaks of classified information seriously but does not comment on internal personnel or investigative matters.

The FBI did not conduct the polygraph tests, according to people with direct knowledge of the matter, because the military has its own investigators. Federal law allows defense secretaries to direct counterintelligence investigations that may include polygraphs, though examinations are subject to procedural safeguards and consent requirements.