Hackers leaked about 40,000 Homeland Security staff records, sources say.

The data names several undercover Immigration and Customs Enforcement agents, sources confirmed.

A group calling itself Department of Peace claimed the hack, and the leak site Distributed Denial of Secrets published the data.

Its co-founder Emma Best said a search tool would “replace anonymity with accountability.”

The department has promised an update but has not said how the data left its systems.

How each outlet framed it
Fox News leans critical
reports that Fox's sources and independent checks confirmed undercover ICE agents' names in the leak, and quotes the anti-fascist group's 'Department of Peace' claim

Sources: Fox News