More residents of the Gaza Strip's embattled northern areas are desperately trying to escape Israel's attacks. A United Nations humanitarian agency says on Thursday alone, over 50,000 people are estimated to have fled south on foot or by donkey.

NHK footage shows evacuees carrying their bags into the southern city of Rafah on Friday.

One boy says a UN-operated school in northern Gaza had come under attack, adding that he was also targeted during the journey south.

A woman says she was forced to leave another school being used as a shelter as an Israeli air strike targeted the facility.

More than 1.5 million people, or about 60 percent of the Gaza Strip's population, are believed to have been internally displaced since October 7, when the escalation began.

Two new evacuation centers have reportedly been set up in the central region.

The UN Office for the Coordination of Humanitarian Affairs says hundreds of thousands of people who remain in the north are running critically low on water and food.

On Friday, the UN Relief and Works Agency for Palestine Refugees in the Near East said 101 agency workers have been killed in the fighting.

The agency has released a video listing the victims' names. It says, "They were teachers, school principals, engineers, doctors, a psychologist, support staff, sanitation and tech workers. They were mothers, fathers, sons, daughters, husbands and wives. They are not just numbers, they are our friends and colleagues, UNRWA will never be the same without them."