Israel's ambassador to the United Nations expressed disappointment Thursday at U.S. President Joe Biden's threat to stop certain arms supplies to Israel if it invades the crowded Gaza city of Rafah.

"This is a difficult and very disappointing statement to hear from a president to whom we have been grateful since the beginning of the war," Gilad Erdan told Israeli public broadcaster Kan radio, in Israel's first reaction to Biden's warning.

Hamas has formally accepted a cease-fire deal that could end the war in Gaza. Israel, however, insists that its core demands were not met in the proposal mediated by Egypt and Qatar.

The Palestinian militant group says the cease-fire would unfold in three phases of six to seven weeks each, with Israeli hostages released in exchange for Palestinian prisoners and the gradual withdrawal of Israeli forces from all of the Gaza Strip and increased humanitarian aid.

Hospitals in the southern Gaza Strip have only three days of fuel left, the head of the World Health Organization said Wednesday, due to the closure of border crossings.

"The closure of the border crossing continues to prevent the U.N. from bringing fuel. Without fuel all humanitarian operations will stop. Border closures are also impeding delivery of humanitarian aid into Gaza. Hospitals in the south of Gaza only have three days of fuel left, which means services may soon come to a halt," Tedros Adhanom Ghebreyesus said on X, formerly Twitter.

The U.S. paused a shipment of bombs to Israel last week over concerns that Israel was approaching a decision on launching a full-scale assault on the southern Gaza city of Rafah against the wishes of the U.S., a senior administration official said Tuesday.

The shipment was supposed to consist of 1,800 2,000-pound (900-kilogram) bombs and 1,700 500-pound (225-kilogram) bombs, according to the official, who spoke on the condition of anonymity to discuss the sensitive matter, with the focus of U.S. concern being the larger explosives and how they could be used in a dense urban setting. More than 1 million civilians are sheltering in Rafah after evacuating other parts of Gaza amid Israel's war on Hamas, which came after the militant group's deadly attack on Israel on Oct. 7.

The Russian foreign ministry on Wednesday insisted that Israel strictly observe international humanitarian law after its tanks entered the border city of Rafah.

At a briefing, spokeswoman Maria Zakharova said Russia sees the incursion as "an additional destabilizing factor" in an area with more than a million civilians, and therefore "we demand strict observance of the provisions of international humanitarian law," the RIA Novosti state news agency reported.

Talks aimed at agreeing the terms of a truce in the seven-month war between Israel and Hamas in Gaza resumed in Cairo Wednesday "with all sides present", Egyptian media reported.

"Truce negotiations have resumed in Cairo today with all sides present," Egypt's AlQahera News, which is close to the intelligence services, reported, citing a "senior official" it did not identify.

The Israeli military said Wednesday that it has reopened the Kerem Shalom crossing into Gaza, a key terminal for the entry of humanitarian aid that was closed over the weekend after a Hamas rocket attack killed four Israeli soldiers nearby.

An Israeli tank brigade seized the nearby Rafah crossing between Gaza and Egypt early Tuesday, and it remained closed, but that limited incursion does not appear to be the start of the full-scale invasion of the crowded southern city that Israel has repeatedly promised.

Iraq's powerful Kataeb Hezbollah has renewed its call for U.S. troops to withdraw from Iraq, months after the Iran-backed armed group suspended attacks against American forces.

Washington and Baghdad have been engaged in talks over the presence of U.S. troops in Iraq, who are stationed there as part of an international anti-jihadist coalition.

A merchant vessel passing through the Gulf of Aden off Yemen reported two explosions in "close proximity", British maritime security agency UKMTO said Tuesday.

Thousands of Israelis rallied around the country Monday night calling for an immediate deal to release the hostages still held in the Gaza Strip.

The protests came as Israel’s War Cabinet voted to begin an operation on the city of Rafah, saying that a cease-fire proposal Hamas accepted earlier in the night was not in line with Israeli demands.