More than 300,000 people have fled Rafah in the week since Israel issued a partial evacuation order, the United Nations agency operating in Gaza said on Sunday.

The U.N. Agency for Palestine Refugees called the evacuation "forced and inhumane."

"There is nowhere safe to go," the agency said on social media, repeating the phrase three times for emphasis.

The Israeli military late Saturday called again for civilians to evacuate from much of the eastern part of the city, which is in southern Gaza.

Israel Defense Forces entered Rafah last week, in what they called a "precise" operation ahead of potential invasion.

"Prior to our operations we urge civilians to temporarily move towards humanitarian areas and move away from the crossfire that Hamas puts them in," the Israel Defense Forces said on a post on Telegram. "Our war is against Hamas, not against the people of Gaza."

-ABC News' Dragana Jovanovic and Kevin Shalvey

About 450,000 Palestinians have been displaced from Rafah, fleeing to safety, according to the U.N. Relief and Works Agency for Palestine Refugees in the Near East.

"Inland in Rafah is now a ghost town. It’s hard to believe there were over one million people sheltering here just a week ago,” UNRWA spokesperson Louise Wateridge said. "People face constant exhaustion, hunger and fear. Nowhere is safe. An immediate ceasefire is the only hope."

The development comes as airstrikes continued to hit northern and southern Gaza Tuesday. The Israeli military said it had hit 120 targets in the last 24 hours.

-ABC News' Will Gretsky