The UNRWA has continuously warned that their facilities and workers are being targeted in Israeli airstrikes, and their efforts to deliver aid have been impeded by Israeli forces, against international law. Just weeks ago, the agency was forced to halt its aid operations in Gaza after Israel refused to allow in emergency fuel for hospitals.

In a statement Monday, the agency detailed examples of some who were killed in their homes, and others who were killed waiting for food rations.

""These colleagues were among the 13,000 UNRWA staff working in Gaza, and many of them were killed with their families," the agency wrote. "They were teachers, school principals, health workers, including a gynecologist, engineers, support staff, and a psychologist."

The UNRWA added that "UN facilities, including those providing shelter, have not been spared during the war in Gaza." Over 60 of their facilities have been impacted, including 10 which were directly struck or damaged by Israel. Out of those that were hit, 70 percent were below the Wadi Gaza, which Israel itself designated as an evacuation zone for civilians.

Israel escalates amid calls for ceasefire

The UNRWA hosts nearly 780,000 people in more than 150 facilities across the Gaza Strip. The agency noted that the refugees "came to these shelters to seek protection and safety under the very same UN flag" that was lowered around the world Monday.

”UNRWA staff in Gaza appreciate the UN lowering the flag around the world," said Tom White, Director of UNRWA in the Gaza Strip. "In Gaza however, we have to keep the UN flag flying high as a sign that we are still standing and serving the people of Gaza."