The news that three Israeli hostages were mistakenly shot and killed last month in Gaza by soldiers meant to save them outraged many in Israel, who have since demanded answers about how the army conducts itself on the battlefield and safeguards civilians.

The three male hostages, captured by Hamas terrorists near the Gaza border on Oct. 7, were killed in Gaza City on Dec. 15. The men, aged 24, 26, and 28, were unarmed when they were shot. They had removed their shirts to reveal that their bodies were not strapped with explosives, and they were waving a makeshift white flag.

A military investigation is underway, but immediately after the shootings, officials said the army’s rules of engagement had been violated.

“The shooting of the hostages was carried out contrary to the open-fire regulations,” said Lt. Gen. Herzl Halevi, the Israeli military’s chief of staff. “Shooting at someone who raises a white flag and is seeking to surrender is absolutely prohibited.”