DHS investigates massive data breach exposing 40,000 employees, including ICE and Border Patrol agents

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.