“A son of one of the staff had brought a meal into the building,” Rose said, adding the group then debated whether to eat it in the principal’s office before settling on what appeared to be a classroom decorated with pictures of scientists.
“They were eating when the bomb hit.”
The Israeli military said it had conducted a “precise strike” on Hamas militants within the school grounds and had taken steps to reduce the risk to civilians.
‘Bereft and desperate’
The Israeli military published what it said was a list of nine militants killed in the Nuseirat strike, including three it said were employees of UNRWA.
An Israeli government spokesman said the school had become “a legitimate target” because it was used by Hamas to launch attacks.
Rose said such statements further battered morale among UN staffers still at the school, where thousands have sought shelter from a war that has displaced nearly all of Gaza’s 2.4 million population at least once.
“They were particularly angry by the allegations that had been made as to the involvement of their colleagues in extremist and terrorist activities,” Rose said.
“They felt that this really was a stain on the memory of dear colleagues, dear friends,” he added, describing the mood as “bereft” and “desperate”.
UNRWA has said at least 220 members of the agency’s staff have been killed in the Israel-Hamas war in Gaza, which was triggered by Hamas’s unprecedented attack on southern Israel on October 7.
The attack resulted in the deaths of 1205 people in Israel, mostly civilians, according to an AFP tally based on Israeli official figures.
The militants also seized 251 hostages, 97 of whom are still in Gaza, including 33 the Israeli military says are dead.
Israel’s retaliation has killed at least 41,182 people in Gaza, according to the Hamas-run territory’s Health Ministry.
On Saturday, UNRWA announced one of its employees was killed during an Israeli raid in the occupied West Bank, the first such death in the territory in more than a decade.
UNRWA has more than 30,000 employees in the Palestinian territories and elsewhere.
It has been in crisis since Israel accused a dozen of its employees of being involved in the October 7 attack.
The UN immediately fired the implicated staff members, and a probe found some “neutrality related issues” but stressed Israel had not provided evidence for its main allegations.