A Palestinian woman carries a child as she walks through the rubble near the Tiba tower which crashed to the ground moments after Israeli strikes targeted the high-rise building in Gaza City . AFP
"To civilians in Gaza: WHO and partners remain in Gaza City," the World Health Organisation said on its X account.
Israel's army is intensifying its attacks on Gaza City -- the main urban centre in the besieged Gaza Strip -- to occupy the city. This week, it warned civilians there to leave.
The UN estimates that around one million Palestinians live in and around Gaza City.
"WHO is appalled by the latest evacuation order," the head of the UN agency, Tedros Adhanom Ghebreyesus, said on X.
He said the Israeli demand that the city's one million people go to what Israel was calling a "humanitarian zone" in the south of the Gaza Strip was unfeasible.
"The zone has neither the size nor scale of services to support those already there, let alone new arrivals," he said.
Tedros pointed out that half of the functioning hospitals left in the Gaza Strip were in Gaza City, and the territory's "crippled health system cannot afford to lose any of these remaining facilities".
He urged the international community to "act", saying that, in Gaza, "this catastrophe is human-made, and the responsibility rests with us all".
Israel's war on Gaza has killed more than 64,000 Palestinians, most of them women and children, according to figures from the Palestinian health ministry that the United Nations considers reliable.
The United Nations declared famine last month in parts of Gaza, warning that 500,000 people face "catastrophic" conditions.
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