Israel carried out airstrikes in Rafah on Monday and told Palestinians to evacuate parts of the southern Gaza city where more than a million people uprooted by the seven-month war have been sheltering in tents and crowded schools.

“Gazans continue to be hit with bombs, disease, and even famine. And today, they have been told that they must relocate yet again as Israeli military operations into Rafah scale up,” UN High Commissioner for Human Rights Volker Turk said in a statement. “This is inhumane.”

Israeli strikes have flattened other parts of Gaza to such an extent that there is no location beyond Rafah with the infrastructure and resources to host those currently sheltering there, the UN human rights office statement added.

Ordering the displacement of civilians is prohibited by international humanitarian law, the statement added, with only a few exceptions which are subject to strict legal requirements. If those requirements are not met, such actions may amount to the war crime of forced displacement, it said.