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.

More than 100 charity and human rights groups say Israel’s blockade and ongoing military offensive are pushing Palestinians in the Gaza Strip toward starvation. Israeli strikes meanwhile

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.