Homeland Security Department Secretary Alejandro Mayorkas has ordered a review of an alleged coverup of over 10,000 complaints of sexual harassment or sexual misconduct filed by DHS employees with the agency’s inspector general.

Mayorkas’s order for an internal probe swiftly followed a report Thursday by the Project on Government Oversight, or POGO, a public interest watchdog group, on actions taken or not taken by DHS Inspector General  Joseph V. Cuffari, a Trump appointee, in response to complaints leveled by more than a third of the department’s workforce.

“More than 10,000 employees at law enforcement components of the Department of Homeland Security (DHS) say they have experienced sexual harassment or sexual misconduct,” POGO investigative journalists Adam Zagorin and Nick Schwellenbach wrote, basing their findings on “an unpublished [IG] report.”

“That’s over one-third of the roughly 28,000 employees who responded to a survey conducted as part of the long-pending review,” they said.