Witnesses and health workers say Israeli forces have opened fire near two aid distribution sites run by the U.S.- and Israeli-backed Gaza Humanitarian Foundation as crowds of hungry Palestinians sought food.

Israel said it would allow more food to enter Gaza and provide secure corridors for humanitarian aid. But U.N. officials say almost nothing has changed.

At least 91 people have been killed near aid centers across the Gaza Strip in the last day, according to reports from Hamas and local hospitals. Israeli forces were reported shooting at the crowds. The deaths at aid sites come as international aid agencieswarn of dire hunger in the territory.