One of the FBI's email systems has been compromised, allowing bad actors to send thousands of messages falsely warning of a possible cybersecurity attack. The FBI has confirmed that it has now patched the software vulnerability which allowed the hack and that the attackers accessed no data.
https://www.notebookcheck.net/The-FBI-s-email-system-has-been-hacked-with-thousands-of-fake-messages-sent.579184.0.html