"Civil order is breaking down in Gaza," a UNRWA official said.
The temporary cease-fire between Hamas and Israel ended on Dec. 1, and Israel has resumed its bombardment of Gaza.
The end of the cease-fire came after Hamas freed over 100 of the more than 200 people its militants took hostage during the Oct. 7 surprise attack on Israel. In exchange, Israel released more than 200 Palestinians from Israeli prisons.
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The latest outbreak of war between Israel and Hamas, the Palestinian militant group that governs the Gaza Strip, has passed the four-month mark.
In the Gaza Strip, at least 30,228 people have been killed and 71,377 others have been wounded by Israeli forces since Oct. 7, according to Gaza's Hamas-controlled Ministry of Health.
In Israel, at least 1,200 people have been killed and 6,900 others have been injured by Hamas and other Palestinian militants since Oct. 7, according to the Israel Defense Forces.
There has also been a surge in violence in the Israeli-occupied West Bank. Israeli forces have killed at least 395 people in the territory since Oct. 7, according to the Palestinian Ministry of Health.
The ongoing war began after Hamas-led militants launched an unprecedented incursion into southern Israel from neighboring Gaza via land, sea and air. Scores of people were killed while more than 200 others were taken hostage, according to Israeli authorities. The Israeli military subsequently launched retaliatory airstrikes followed by a ground invasion of Gaza, a 140-square-mile territory where more than 2 million Palestinians have lived under a blockade imposed by Israel and supported by Egypt since Hamas came to power in 2007. Gaza, unlike Israel, has no air raid sirens or bomb shelters.
Egypt is intensifying efforts with all parties to reinstate the truce between Hamas and Israel as soon as possible, Diaa Rashwan, the head of Egypt's State Information Service, said Thursday.
Gaza's Hamas-run Ministry of Health said Thursday that 350 people have been killed there in the past 24 hours, bringing the death toll since Oct. 7 to over 17,000.
-ABC News' Nasser Atta and Morgan Winsor
The Israel Defense Forces said Thursday morning that its "troops killed Hamas terrorists and struck dozens of terror targets" during operations in Khan Yunis in the southern Gaza Strip over the past day.
"IDF troops engaged with a terrorist cell that exited from a tunnel shaft, killed two terrorists in combat and struck the shaft," the IDF said in a statement.
Israeli troops also "conducted a targeted raid on a military compound belonging to Hamas' Central Jabalya Battalion" during operations in Jabalya in northern Gaza, according to the IDF.
"A number of terrorists were killed as part of the activity," the IDF added. "Furthermore, the forces located a network of underground tunnels that lead out of the compound, as well as a training area and weapons storage facility in the area of the compound."
In addition to the ground operations in Gaza, Israeli warships over the past day "struck Hamas military compounds and infrastructure using precise ammunition and firing shells," according to the IDF.
-ABC News' Morgan Winsor
Around 83% of households in southern Gaza suffering from inadequate food consumption, according to a new report from the World Food Programme.
The organization also reported Wednesday that 97% of households in northern Gaza have inadequate food consumption.
As a result, 95% of households are adopting extreme food consumption strategies to cope with food shortages in northern Gaza, the report said, with 82% of households doing the same in southern Gaza.
-ABC News' Ellie Kaufman
