Israel-Gaza updates: Gaza sees deadliest day since conflict began

United Nations Secretary-General António Guterres is responding to the Israeli ambassador's call for him to resign, saying it's false to accuse him of "justifying" Hamas' attacks.

At the U.N. Security Council meeting on Tuesday, Guterres asserted that "the attacks by Hamas did not happen in a vacuum," sparking immediate backlash from Israel's ambassador to the U.N., Gilad Erdan.

"The Secretary-General is completely disconnected from the reality in our region and that he views the massacre committed by Nazi Hamas terrorists in a distorted and immoral manner," Erdan said. "His statement that, 'The attacks by Hamas did not happen in a vacuum,' expressed an understanding for terrorism and murder."

5:24

Experts breakdown Israel-Hamas conflict

Susannah Heschel, Chair of the Jewish Studies Program at Dartmouth University, and Chuck Freilich, a former deputy national security adviser in Israel, explain the conflict.

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"It’s truly sad that the head of an organization that arose after the Holocaust holds such horrible views," Erdan said.

Guterres said at the U.N. Wednesday, "I am shocked by the misinterpretations by some of my statement yesterday in the Security Council, as if I was justifying acts of terror by Hamas. This is false. It was the opposite. In the beginning of my intervention yesterday, I clearly stated -- and I quote: 'I have condemned unequivocally the horrifying and unprecedented 7 October acts of terror by Hamas in Israel. Nothing can justify the deliberate killing, injuring and kidnapping of civilians, or the launching of rockets against civilian targets.'"

"Indeed, I spoke of the grievances of the Palestinian people," Guterres continued. "And in doing so, I also clearly stated, and I quote: 'But the grievances of the Palestinian people cannot justify the appalling attacks by Hamas.'"

In Gaza, where the "health system is collapsing," doctors "cannot offer much" to their hundreds of severely wounded patients, Dr. Mohammed Ghandil from Gaza's Nasser Hospital told ABC News.

"The hospital door is open, but the health care is not provided," Ghandil said.

"We are just giving some peaceful words for them to die," he said.

The World Health Organization said Tuesday that one-third of hospitals in Gaza and two-thirds of clinics were not functioning.

More than 17,000 people in Gaza have been wounded since Oct. 7.

"Even the medical patient [who] was not wounded, who came with heart attack, with stroke, with sepsis, we're just sending them home because there is no bed in the hospital," he said. "The hospital corridors, the hospital backyards, the hospital balcony are fully, fully packed with the severely wounded."

Gaza is set to run out of fuel Wednesday night, according to the United Nations Relief and Works Agency for Palestine Refugees in the Near East.

"If the fuel is zero," Ghandil said, "the doctors and the nurses will go home and the hospital will turn to a big morgue."

18:06

ABC News Live: Hospitals in Gaza on the brink of collapse

The U.N. Relief and Works Agency says Gaza will run out of fuel as soon as Wednesday, forcing hospitals to stop operations.

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-ABC News' Somayeh Malekian

"Some progress" has been made as Qatar continues its hostage negotiations with Hamas, Qatari Foreign Minister Mohammed bin Abdulrahman Al-Thani said at a news conference.

"If we compare where we started and where we are right now, there is some progress and some breakthrough and we will remain hopeful," he said. "The negotiations are still ongoing and at any moment of time, I think that if we will be able to get along between the two parties, I think we will see some breakthroughs hopefully soon."

Israel reported that 222 hostages were taken by Hamas. Four hostages have been released in the last week: two American women and two Israeli women.

The United Nations General Assembly will be called back into an emergency special session in New York on Thursday morning to debate the Israel-Hamas war.

The general assembly could vote on moves, including a humanitarian pause in Gaza and the establishment of an international protective presence in Gaza.

3:35

A history of conflict: An ongoing war between Israel and Palestine

The Hamas terrorist attack on Israel this weekend comes amid the backdrop of a longstanding history of conflict over land and independence that has plagued the region. 

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