The two countries have been fighting a shadow war for years. But direct attacks are bringing direct reprisals, or at least plans for them.

On Monday, a White House spokesperson said President Biden was "deeply concerned" about the unauthorized release.

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

President Joe Biden is "deeply concerned" about a leak of classified documents that contain the US's assessment of Israeli plans to attack Iran, White House National Security Council spokesman John Kirby said. Officials have not determined whether the documents were released due to a hack or a leak, Mr Kirby said.

The FBI is investigating the public disclosure of a pair of highly classified intelligence documents describing Israel's preparations for a retaliatory strike on Iran, the bureau said on Tuesday. "The FBI is investigating the alleged leak of classified documents and working closely with our partners in the Department of Defense and Intelligence Community,

Former British commander Richard Kemp discusses the “damaging” effect of the classified documents leak regarding Israel’s planned attack on Iran.

Report by UK's Times says Israel has developed an alternative course of action but must war-game it before proceeding due to the need to 'change certain strategies and components' The post Israel said to have delayed Iran strike after US intel leak of attack plans appeared first on The Times of Israel.

As the signs of ceasefire in Middle East seems far away, anticipation of Israeli retaliation for Iran's attack has been growing. Israeli Defense Minister Chief, Yoav Gallant on Oct 23 briefed troops of Israeli Air Force during which he called for Israeli attack on Iran.