At least 798 people in Gaza have reportedly been killed while receiving aid in the past six weeks - while acute malnutrition is said to have reached an all-time high.
The UN human rights office said 615 of the deaths - between 27 May and 7 July - were "in the vicinity" of sites run by the controversial US and Israel-backed Gaza Humanitarian Foundation (GHF).
A further 183 people killed were "presumably on the route of aid convoys," said Ravina Shamdasani, from the Office of the UN High Commissioner for Human Rights.
Its figures are based on a range of sources, including hospitals, cemeteries, and families in the Gaza Strip, as well as non-governmental organisations (NGOs), its partners on the ground, and Hamas-run health authorities.
Aid agency Project Hope said on Thursday that 10 children were among at least 15 people killed as they waited for its clinic in Deir al Balah to open.
The GHF has claimed the UN figures are "false and misleading" and has repeatedly denied any violence at or around its sites.
Meanwhile, Medecins Sans Frontieres (MSF) - also known as Doctors Without Borders - said two of its sites were seeing their worst-ever levels of severe malnutrition.
Cases at its Gaza City clinic are said to have tripled from 293 in May to 983 in early July.
"Over 700 pregnant or breastfeeding women and nearly 500 children are now receiving emergency nutritional care," MSF said.
The humanitarian medical charity said food prices were at extreme levels, with sugar at $766 (£567) per kilo and flour $30 (£22) per kilo, and many families surviving on one meal of rice or lentils a day.
It's a major concern for the estimated 55,000 pregnant women in Gaza, who risk miscarriage, stillbirth and malnourished infants because of the shortages.
The GHF began distributing food packages in Gaza at the end of May, after Israel eased its 11-week blockade of aid into the coastal territory.
It has four distribution centres, three of which are in the southern Gaza Strip.
The sites, kept off-limits to independent media, are guarded by private security contractors and located in zones where the Israeli military operates.
Palestinian witnesses say Israeli forces have repeatedly opened fire towards crowds of people going to receive aid.
The Israeli military says it has fired warning shots at people who have behaved in what it says is a suspicious manner.
It says its forces operate near the aid sites to stop supplies from falling into the hands of militants.
Read more:
GHF aid distribution linked to increased deaths
Gaza situation 'apocalyptic', says UN expert
After the deaths of hundreds of Palestinians trying to reach the aid hubs, the United Nations has called the GHF's aid model "inherently unsafe" and a violation of humanitarian impartiality standards.
In response, a GHF spokesperson said: "The fact is the most deadly attacks on aid sites have been linked to UN convoys."
The GHF says it has delivered more than 70 million meals to Gazans in five weeks and claims other humanitarian groups had "nearly all of their aid looted" by Hamas or criminal gangs.
(c) Sky News 2025: 'At least 798 killed' at Gaza aid points - as medical charity warns acute malnutrition at all-time hig
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