More than 1,000 Palestinians have been killed by Israeli forces since May while trying to get food in Gaza, mostly near food sites run by an American contractor, the U.N. human rights office said.

Health authorities say Israeli strikes in Gaza killed at least 21 people. More than half of those killed late Tuesday and early Wednesday reportedly were women and children.

Humanitarian aid agencies are warning that their staff inside Gaza are starving alongside the civilians they are trying to help