Israeli air strikes pounded parts of Gaza's biggest city on Thursday, Hamas said, after Israel's military declared an end to its operation in an eastern district that saw Gaza City's heaviest combat in months.

A slight majority of Israelis supports ending the war in Gaza as part of a cease-fire deal that would free all hostages held by Hamas, according to a poll released Wednesday.

The poll by the Israel Democracy Institute, a Jerusalem think-tank, found that 56% of Israelis favor a complete cease-fire to return all the hostages and Israel’s full withdrawal from the Gaza Strip. That figure stands in contrast to a key position of Israeli Prime Minister Benjamin Netanyahu in ongoing cease-fire talks – that Israel won’t commit to ending the war as part of any deal.

The United Nations is warning that Israel’s order for Palestinians to leave Gaza City will fuel mass suffering and is insisting that civilians must be protected and their needs must be met whether they flee or stay.

U.N. spokesman Stephane Dujarric told reporters Wednesday that this warning from the U.N. humanitarian office means that all parties involved in the conflict in Gaza must respect international humanitarian law at all times. Protection of civilians and the infrastructure for their survival are key requirements of the law.

The U.S. has agreed to send Israel hundreds of 500-pound bombs from a shipment that the Biden administration withheld because of concerns about Israeli operations in the southern Gaza city of Rafah, according to three U.S. officials.

U.S. President Joe Biden announced in May that he would not supply offensive weapons that Israel could use to launch an all-out assault on Rafah over concern for the well-being of hundreds of thousands civilians sheltering there.

A suspected attack by Yemen's Houthi rebels targeted a Liberian-flagged tanker in the narrow Bab el-Mandeb Strait on Wednesday, as authorities acknowledged the rebels launched their longest-range attack yet on a U.S.-flagged vessel near the Arabian Sea.

The attacks come after an unexplained pause of a week and a half. The rebels may be regrouping ahead of the arrival of a new U.S. aircraft carrier to the region after the USS Dwight D. Eisenhower began heading home.

France on Wednesday condemned Israel's recent deadly air strikes on schools sheltering displaced Palestinians in Gaza, declaring such tactics "unacceptable".

"We call for these strikes to be fully investigated," the foreign ministry said, highlighting a strike on Tuesday on a school near the southern city of Khan Yunis.

Syria's national airline resumed regular services to Saudi Arabia after a 12-year suspension on Wednesday as the first flight arrived in Riyadh.

The Israeli army on Wednesday dropped leaflets on Gaza City urging all residents to leave for safe zones amid an intensified military offensive on the Palestinian territory's main city.

The thousands of leaflets, addressed to "everyone in Gaza City", set out routes out of the city to the south and warned it would "remain a dangerous combat zone", an AFP journalist said.

An Israeli airstrike on a school-turned-shelter in southern Gaza killed at least 25 Palestinians on Tuesday, as heavy bombardment in the north forced the closure of medical facilities in Gaza City and sent thousands fleeing in search of increasingly elusive refuge.

Israel's new ground assault in Gaza's largest city is its latest effort to battle Hamas militants regrouping in areas the army previously said had been largely cleared.

The pier built by the U.S. military to bring humanitarian aid to Gaza will get reinstalled Wednesday to be used for several days, but then the plan is to pull it out permanently, several U.S. officials said. It would deal the final blow to a project long plagued by bad weather, security uncertainties and difficulties getting food into the hands of starving Palestinians.

Heavy Israeli bombardments pounded Gaza City on Tuesday, driving thousands of Palestinians to flee and forcing medical facilities to shut down because of the latest offensive in the territory’s north. And in southern Gaza, an apparent Israeli airstrike on a school-turned-shelter killed at least 25 people and wounded dozens more, Palestinian health officials said.