The United Nations is investigating the deaths of 875 Palestinians near aid distribution sites in Gaza, with reports linking the fatalities to controversial US and Israeli-backed aid hubs.

The U.N. rights office said on Friday it had recorded at least 798 killings within the past six weeks at aid points in Gaza run by the U.S.- and Israeli-backed Gaza Humanitarian Foundation and near convoys run by other relief groups.

Ten Palestinians were reported killed Friday while waiting for rations in Gaza, adding to nearly 800 similar deaths in the last six weeks, according to the UN, with Israel's army saying it issued