(CNN) — The US is investigating a leak of highly classified US intelligence about Israel’s plans for retaliation against Iran, according to three people familiar with the matter. One of the people familiar confirmed the documents’ authenticity.
The leak is “deeply concerning,” a US official told CNN.
The documents, dated October 15 and 16, began circulating online Friday after being posted on Telegram by an account called “Middle East Spectator.”
They are marked top secret and have markings indicating they are meant to be seen only by the US and its “Five Eyes” allies — Australia, Canada, New Zealand and the United Kingdom.
They describe preparations Israel appears to be making for a strike against Iran. One of the documents, which says it was compiled by the National Geospatial-Intelligence Agency, says the plans involve Israel moving munitions around.
Another document says it is sourced to the National Security Agency and outlines Israeli …