Acting Secretary of Homeland Security Kevin McAleenan is at the center of a federal investigation into the leak of confidential government information in late June that forced Immigration and Customs Enforcement (ICE) to call off a nationwide operation, three senior administration officials told the Washington Examiner.

Following the publishing of sensitive leaked law enforcement information on June 21, then-acting ICE Director Mark Morgan’s team followed department protocol and reported the incident to the ICE Joint Intake Center (JIC) so they could investigate. JIC is an agency office that handles internal investigations of personnel misconduct, sexual abuse, staff neglect, or violations of responsibilities that may have contributed to such incidents.

“There is an ongoing investigation. An internal investigation has been launched,” one official said in a phone call Friday.