Israel has cut off the entry of all food and other goods into Gaza in an echo of the siege it imposed in the earliest days of its war with Hamas.

Food, medicine and shelter stockpiles in Gaza are limited and aid intended for Palestinians in desperate need may spoil following Israel's suspension of deliveries to the enclave, humanitarian agencies said on Monday.

Human rights groups stress that weaponizing starvation by intentionally depriving civilians of lifesaving aid is a war crime under international humanitarian law.