American officials have expressed alarm following the leak of U.S. intelligence documents detailing Israel's preparations for a potential attack on Iran, according to Israeli news site Walla.

The leak reportedly occurred on a Telegram account linked to Iran, raising significant concerns among U.S. officials, who described the situation as "extremely serious." However, they assured that the leak would not affect Israeli operational plans.

An Israeli official confirmed that the Israeli security establishment is aware of the leak and is taking it seriously.

U.S. President Joe Biden stated on Friday that he is informed about Israel's response to the missile attacks launched by Iran, including timing, but refrained from divulging further details.

In response to Biden's comments, Iranian Foreign Minister Abbas Araqchi warned that anyone aware of the timing and manner of an Israeli attack on Iran would "be held accountable."

Israeli public broadcaster KAN reported that a consensus had been reached among security officials regarding the method, timing, and intensity of Israel's response to Iran's actions, pending approval from the Israeli security cabinet.

Additionally, Israeli newspaper Yedioth Ahronoth noted that the decision to attack Iran would be made by Prime Minister Benjamin Netanyahu, Defense Minister Yoav Gallant, and Chief of Staff Herzi Halevi, with the security cabinet briefed on the outlines of the response.

Earlier, NBC News reported that U.S. officials believe Israel has identified specific targets in its anticipated response to Iran's recent attacks, with expectations that "the response could come during the current Yom Kippur holiday."

On October 1, Iran launched its largest attack on Israel, firing approximately 200 ballistic missiles. This action was described as retaliation for the assassination of Hamas leader Ismail Haniyeh in Tehran in late July, as well as the killing of Hezbollah leader Hassan Nasrallah and a general in the Iranian Revolutionary Guard during an Israeli airstrike in southern Beirut.