The FBI is using polygraph tests to identify leaks to the news media, following the lead of the Department of Homeland Security and the Federal Emergency Management Agency.

FBI Director Kash Patel ordered the bureau to administer polygraph tests to identify the source of information leaks, according to an FBI spokesperson, and those tests have begun in recent weeks, The Washington Post reported Monday.

“The seriousness of the specific leaks in question precipitated the polygraphs, as they involved potential damage to security protocols at the bureau,” the spokesperson said, declining to elaborate.

Polygraph testing is a requirement at large intelligence agencies to establish employment eligibility and for continued access to classified materials.