U.S. investigating unauthorized release of classified documents on Israel's attack plans

The United States is investigating a reported unauthorized release of classified documents that assess Israel's plans to attack Iran, a U.S. defense official confirmed to CBS News.

The documents are attributed to the National Geospatial-Intelligence Agency and National Security Agency, and note that Israel was still moving military assets in place to conduct a military strike in response to Iran's blistering ballistic missile attack on Oct. 1. They were sharable within the "Five Eyes," which are the U.S., Britain, Canada, New Zealand and Australia.

The documents, which are marked top secret, were posted to the Telegram messaging app and first reported on Saturday by CNN and Axios.