TEL AVIV, Israel (AP) 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 Israels history.

Maj. Gen. Aharon Halivas resignation could set the stage for more resignations among Israels top security brass over Hamas attack, when militants blasted through Israels 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.

The intelligence directorate under my command did not live up to the task we were entrusted with. I carry that black day with me ever since, day after day, night after night. I will carry the horrible pain of the war with me forever, Haliva wrote in his resignation letter, which was provided by the military.

Haliva, as well as other military and security leaders, were widely expected to resign in response to the glaring failures that led up to Oct. 7 and the scale of its ferocity.

But the timing of the resignations has been unclear because Israel is still fighting Hamas in Gaza and battling the Lebanese militant group Hezbollah in the north. Tensions with Iran are also at a high following attacks between the two enemies. Some military experts have said resignations at a time when Israel is engaged on multiple fronts is irresponsible and could be interpreted as a sign of weakness.