The head of Israeli military intelligence resigned on Monday over the failures surrounding Hamas’ unprecedented Oct. 7 attack, the military said, becoming the first senior figure to step down over his role in the deadliest assault in Israel’s history.

Maj. Gen. Aharon Haliva’s resignation could set the stage for more resignations among Israel’s top security brass over Hamas’ attack, when militants blasted through Israel’s border defenses, rampaged through Israeli communities unchallenged for hours and killed 1,200 people, most civilians, while taking roughly 250 hostages into Gaza. That attack set off the war against Hamas in Gaza, now in its seventh month.