At least six members of the UN agency for Palestinian refugees were among the 18 killed Wednesday when Israel bombed a school housing displaced Palestinians in central Gaza.
The Al-Jawni school in Nuseirat had already been bombed several times over the course of the 11-month war in Gaza.
The latest strike Wednesday flattened part of the U.N.-run facility where Gazans had sought shelter, leaving only a charred heap of rebar and concrete.
"For the fifth time, Israeli forces bombed the UNRWA-run Al-Jawni School, killing 18 citizens, including two UNRWA staff members, children, and women, and injuring more than 18 others," Gaza's Civil Defence spokesperson Mahmud Bassal posted on Telegram, referring to the U.N. agency for Palestinian refugees.
UNRWA later confirmed six of its staffers had been killed in two Israeli air raids on the Nuseirat school and its surroundings, calling it the highest death toll among its team in a single incident.
"Among those killed was the manager of the UNRWA shelter and other team members providing assistance to displaced people," the U.N. agency posted on X.
"Schools and other civilian infrastructure must be protected at all times, they are not a target."
Across the besieged strip, many school buildings have been repurposed to shelter displaced families as the vast majority of Gaza's 2.4 million people have been repeatedly uprooted by the war.
Israeli forces have struck several such schools in recent months, saying Palestinian militants were operating there and hiding among displaced civilians – charges denied by Hamas.
The Israeli military said in a statement that it had conducted a "precise strike" on an alleged Hamas command and control center within the Al-Jawni compound. It did not elaborate on the outcome but said "numerous steps" were taken to reduce the risk to civilians.
Survivors of the strike scrambled to retrieve bodies and belongings from the rubble, telling AFP they had to step over "shredded limbs."
"I can hardly stand up," said one man, holding a plastic bag of human remains.
"We've been going through hell for 340 days now, what we've seen over these days, we haven't even seen it in Hollywood movies, now we're seeing it in Gaza."
'Senseless killing'
Gaza has repeatedly been called the world's deadliest place for humanitarian workers, with aid organizations repeatedly faulting the "deconfliction" process – the coordination of movements with military parties.
In a statement, the U.N. said that the Nuseirat school had been "deconflicted" earlier Wednesday.
UNRWA head Philippe Lazzarini said after the school strike that at least 220 members of the agency's staff have been killed in Gaza.
"Endless & senseless killing, day after day," he posted on X.
"Humanitarian staff, premises & operations have been blatantly & unabatedly disregarded since the beginning of the war."
U.N. chief Antonio Guterres called what is happening in Gaza "totally unacceptable."
In response, Israel's ambassador to the U.N. accused Guterres of distorting reality.
"It is unconscionable that the UN continues to condemn Israel in its just war against ..., while Hamas continues to use women and children as human shields," Ambassador Danny Danon wrote on social media.
"The solution," he added, "is not a ceasefire, but the release of all hostages still held in Gaza and the elimination of Hamas," he added.
Months of behind-the-scenes negotiations mediated by Qatar, Egypt and the United States have so far failed to secure a truce.
A Hamas delegation met Qatari and Egyptian mediators in Doha on Wednesday, the Palestinian resistance group said in a statement, which did not indicate whether there was a breakthrough.
Recent rounds of mediation held in Doha and Cairo have tried to hash out a framework laid out in May by U.S. President Joe Biden but both Israel and Hamas have publicly signalled deeper entrenchment in their negotiating positions.
Helicopter crash
The war was triggered by the Oct. 7 Hamas incursion of southern Israel, which caused 1,205 deaths, according to official Israeli figures.
Israel's genocidal military campaign, in comparison, has killed at least 41,084 people in Gaza, according to the territory's Health Ministry. The U.N. rights office says most of the dead are women and children.
Israel's military meanwhile reported the deaths of two soldiers when a helicopter crashed in the area of Gaza's southern city of Rafah. Another eight soldiers were injured.
The aircraft had been on a "life-saving operation" to evacuate a wounded soldier when it crashed, Maj. Gen. Tomer Bar said in a Wednesday statement.
The latest deaths bring the Israeli military's losses in the Gaza campaign to 344 since its ground offensive began on Oct. 27.