The Department of Homeland Security (DHS) is investigating a potentially massive data breach that may have exposed the identities and contact information of tens of thousands of employees, sources told Fox News.The suspected breach, which sources described as a "catastrophic" security incident, may have exposed the names, titles, locations and, in some cases, phone numbers and email addresses of approximately 40,000 DHS employees and contractors, including roughly 10,000 ICE personnel, according to sources familiar with the data.The data also includes records associated with more than 20,000 U.S.Customs and Border Protection (CBP) employees, including Border Patrol personnel.Multiple sources confirmed the authenticity of portions of the data.EXCLUSIVE: DHS SECRETARY MULLIN SLAMS SANCTUARY POLITICIANS AS ATTACKS ON ICE OFFICERS SKYROCKETU.S.
Secretary of Homeland Security Markwayne Mullin (C) speaks during a press conference at U.S.Immigration and Customs Enforcement (ICE) headquarters on October 09, 2026 in Washington, DC.
(Kevin Dietsch/Getty Images)The data leak website Distributed Denial of Secrets said Wednesday it had released information about the employees.Fox News independently confirmed that the leaked records include the names of several undercover ICE agents working in different parts of the country.An anti-fascist hacking group calling itself the "Department of Peace" claimed responsibility for obtaining the data."DHS is aware of a potential breach and is actively working to address the situation swiftly and effectively," a department spokesperson told Fox News.NY COP CALLS FOR POLICE PROTECTIONS AFTER PROTESTER HE ARRESTED SHOWED UP TO HIS HOUSE, HARASSED HIS FAMILYU.S.Immigration and Customs Enforcement ICE agents walk down a street during a multi-agency targeted enforcement operation in Chicago, Ill., on Jan.
26, 2025.(Christopher Dilts/Bloomberg via Getty Images)"We take all security threats against our employees and officers seriously and will w...