Twenty Palestinians were killed Wednesday in the crush of a crowd at a food distribution site run by an Israeli-backed American organization in the Gaza Strip, the group said, the first time it has acknowledged deadly violence at its operations.

Gaza health officials say Israeli strikes overnight and into Tuesday killed more than 90 Palestinians across the Gaza Strip, including several families.

The U.N. 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 U.S.- and Israeli-backed Gaza Humanitarian Foundation and convoys run by other relief groups,