FBI Believes US Intel Leak On Israel Was Likely A Government Insider, Not Hacking

The FBI and the Department of Defense are scrambling to uncover how it was that two highly classified intelligence documents related to Israel’s preparation for a potential retaliatory attack on Iran appeared on a Middle East news-related Telegram channel days ago.

The White House has described President Biden as "deeply concerned" over the serious breach, and has confirmed there is an intense investigation ongoing to ascertain how it happened and who had access.

At this point it's not even confirmed whether the documents were made public via a hack or a leak by an individual who had access to them.

The documents were produced by the US National Geospatial-Intelligence Agency and National Security Agency, and were marked "Top Secret" and restricted from distribution from most foreign allies, with the exception of countries belonging to the "Five Eyes".