Israel is “engineering chaos and massacres” in the Gaza Strip by continuing to block aid deliveries and opening fire on starving Palestinians seeking desperately needed food supplies, a humanitarian official has warned.

Israel’s retaliatory offensive has killed more than 60,000 Palestinians, according to Gaza’s Health Ministry. Its count doesn’t distinguish between fighters and civilians. The ministry operates under the Hamas government. The U.N. and other international organizations see it as the most reliable source of data on casualties.