Warning comes as Israeli forces again opened fire on Palestinians waiting for food aid in northern Gaza.
The warnings on Tuesday came as footage from northern Gaza showed Israeli forces again opening fire on Palestinians gathering to collect food in the area.
It was not immediately clear if the shooting led to deaths or injuries.
Israel’s war on Gaza, now in its fifth month, has killed at least 29,878 Palestinians, most of them women and children. The assault began after Hamas – the armed group that governs Gaza – launched attacks inside Israel on October 7, killing some 1,139 people and taking 253 others captive.
Israel’s subsequent military campaign – which has included daily air attacks, a ground offensive into north and central Gaza and the closing of all but one crossing point into the territory – has laid much of the Palestinian enclave to waste and triggered a worsening humanitarian crisis.
“Here we are, at the end of February, with at least 576,000 people in Gaza – one-quarter of the population – one step away from famine,” Ramesh Rajasingham, the deputy chief of the UN humanitarian agency (OCHA), told the UN Security Council (UNSC).