The humanitarian organization, which is part of the International Red Cross and Red Crescent Movement, said Sunday that the hospital received two phone calls “with a clear and direct threat” from Israeli authorities instructing them to evacuate the hospital.

“They mentioned that this area is going to be a military zone, that there will be clashes and the area will be dangerous and that we have to evacuate quickly,” said Bassam Mourad, director of Al-Quds Hospital.

The Palestine Red Crescent Society said the hospital is sheltering about 12,000 displaced Palestinians in addition to hundreds of injured people and other patients needing care.