The UN rights office said on Tuesday it had recorded at least 875 killings within the past six weeks at aid points in Gaza run by the US- and Israeli-backed Gaza Humanitarian Foundation and convoys run by other relief groups, including the United Nations.
The majority of those killed were in the vicinity of Gaza Humanitarian Foundation sites, while the remaining 201 were killed on the routes of other aid convoys.
The GHF uses private US security and logistics companies to get supplies into Gaza, largely bypassing a UN-led system that Israel alleges has let Hamas-led fighters loot aid shipments intended for civilians. Hamas denies the allegation.
The GHF, which began distributing food packages in Gaza in late May after Israel lifted an 11-week aid blockade, previously told Reuters that such incidents have not occurred on its sites and accused the UN of misinformation, which it denies.
The GHF did not immediately respond to a request for comment on the latest UN figures.
"The data we have is based on our own information gathering through various reliable sources, including medical human rights and humanitarian organizations," Thameen Al-Kheetan, a spokesperson for the UN Office of the High Commissioner for Human Rights, told reporters in Geneva.
The United Nations has called the GHF aid model "inherently unsafe" and a violation of humanitarian impartiality standards.
The GHF said on Tuesday it had delivered more than 75 million meals to Gaza Palestinians since the end of May, and that other humanitarian groups had "nearly all of their aid looted" by Hamas or criminal gangs.
The Israeli army previously told Reuters in a statement that it was reviewing recent mass casualties and that it had sought to minimize friction between Palestinians and the Israeli army by installing fences and signs and opening additional routes.
The UN Office for the Coordination of Humanitarian Affairs has previously cited instances of violent pillaging of aid, and the UN World Food Program said last week that most trucks carrying food assistance into Gaza had been intercepted by "hungry civilian communities".
