Israel's domestic security agency Shin Bet acknowledged its failure in preventing Hamas's attack on October 7, 2023, stating that the deadliest day in Israel's history could have been averted. The agency's chief Ronen Bar took responsibility for the failures and called for a broader probe into the role of Israel's security and political elements. The investigation found that the Shin Bet failed to recognize the immediate threat from Hamas and that prior knowledge of the attack plan was not treated as an actionable threat. The military inquiry also noted flaws in intelligence assessments of Hamas and the army's overconfidence in its knowledge.