The UN said Tuesday that Israel's blocking of aid into devastated Gaza coupled with its military offensive could amount to using starvation as a "weapon of war", which would be a "war crime".
United Nations human rights chief Volker Turk denounced the rampant hunger and looming famine in Gaza.
"The situation of hunger, starvation and famine is a result of Israel's extensive restrictions on the entry and distribution of humanitarian aid and commercial goods," he said.
It was also linked to the "displacement of most of the population, as well as the destruction of crucial civilian infrastructure".
"The extent of Israel's continued restrictions on the entry of aid into Gaza, together with the manner in which it continues to conduct hostilities, may amount to the use of starvation as a method of war, which is a war crime," Turk added.
His spokesman, Jeremy Laurence, told reporters in Geneva that the final determination of whether "starvation is being used as a weapon of war" would be determined by a court.
The comments came after a UN-backed food security assessment determined that the devastated Palestinian territory is facing imminent famine.
The Israeli assault, which began after Hamas's October 7 attack on Israel, left roughly half of Gazans - around 1.1 million people - experiencing "catastrophic" hunger, the assessment warned.
Without a surge of aid, famine would hit the 300,000 people in Gaza's war-battered north by May, it said.
The finding comes just over five months into the Gaza war, which has killed more than 31,800 people, most of them women and children, according to Gaza's health ministry.
Jens Laerke, spokesman for the UN humanitarian agency OCHA, pointed to the difficulty of clearly determining if the strict criteria have been met to declare a famine.
"The famine thresholds may already be the case in northern Gaza," he told reporters, highlighting that for weeks people had already been reduced to eating bird seed, animal fodder, wild grass and weeds.
"There is literally nothing left," he said.
Looking ahead, he warned that without more aid, Gaza could soon be looking at "more than 200 people dying from starvation per day".
Already, health workers are seeing "newborn babies simply dying because their too-low birthweight" and "children that are at the... brink of death through starvation", World Health Organization spokeswoman Margaret Harris said.
She noted that malnutrition had been basically "non-existent" in Gaza before the war.
The crisis was "entirely man-made", she said, denouncing the lack of safe access to bring in the aid needed to meet the towering needs.
"The clock is ticking," said Turk.
"Everyone, especially those with influence, must insist that Israel acts to facilitate the unimpeded entry and distribution of needed humanitarian assistance and commercial goods to end starvation and avert all risk of famine."
He demanded "an immediate ceasefire, as well as the unconditional release of Israeli hostages still held in Gaza".
Philippe Lazzarini, the head of the UN agency for Palestinian refugees, UNRWA, spoke in Jerusalem of "a situation almost unseen when we talk about famine".
"It usually takes years (in other contexts). Here we talk about a famine in less than four months... So this is clearly an artificially created hunger crisis impacting more than 2.2 million people", he said.