Israel's ambassador to the United Nations, Gilad Erdan, is calling on U.N. Secretary-General António Guterres to resign, saying he's "completely disconnected from the reality in our region."

At the United Nations Security Council meeting, Gutteres delivered some of most forceful rhetoric on the Israel-Hamas war to date, demanding an immediate humanitarian ceasefire “to ease epic suffering, make the delivery of aid easier and safer and facilitate the release of hostages.”

The Secretary-General’s speech, especially his assertion that “the attacks by Hamas did not happen in a vacuum," sparked immediate backlash from Erdan.

"The shocking speech by the UN Secretary-General at the Security Council meeting, while rockets are being fired at all of Israel, proved conclusively, beyond any doubt, that 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."

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

"There is no justification or point in talking to those who show compassion for the most terrible atrocities committed against the citizens of Israel and the Jewish people," Erdan said.

Guterres' spokesperson, Stephane Dujarric, told ABC News, "The Secretary said what he said. Spokesman is not responding further."

-ABC News' Shannon Crawford

The Israeli police said they've identified at least 784 people killed by Hamas.

Police said some bodies were in such bad condition that they have not yet been identified.

At least 1,400 people have died and 4,629 others have been injured in Israel since Hamas' Oct. 7 attack, according to Israeli authorities.

The Biden administration has sent Lt. Gen. James Glynn, a three-star Marine general who is currently serving as the head of Marine personnel, to Israel to advise the country on its military operations, according to a U.S. official.

The news was first reported by Axios on Monday.

Glynn is "not directing operations" but rather is "purely there to provide military advice and pose hard questions to help [the Israel Defense Forces] think through various scenarios," the U.S. official told ABC News.

The official said Glynn was in Israel "temporarily" and was not expected to still be there when a ground operation starts.

-ABC News' Ben Gittleson

Fuel is now the "most vital commodity" in Gaza, according to the World Health Organization.

The limited aid trucks trickling into Gaza have not included any fuel, the organization said. Before Oct. 7, hundreds of trucks entered Gaza every day, including about 45 trucks bringing fuel, said Tamara Alrifai, spokesperson for the U.N. agency for Palestine refugees.

Without fuel, "trucks can’t move and generators can’t produce electricity for hospitals, bakeries and water desalination plants,” said Alrifai.

Alrifai said the United Nations Relief and Works Agency would be responsible for delivering the fuel to hospitals and water desalination plants and keeping it out of Hamas' hands.

The WHO said one in three hospitals in Gaza and two in three clinics are not functioning, with the health system overwhelmed by more than 16,000 injured people.

Dr. Rick Brennan, WHO emergencies director for the Eastern Mediterranean Region, said he's begging "all those in a situation to make a decision or influence decision makers, to give us the humanitarian space to address this human catastrophe."

White House national security spokesperson John Kirby said Tuesday a "ceasefire right now really only benefits Hamas."

When asked if the U.S. has set or discussed any red lines with the Israelis, he said simply, "No."

But when pressed to elaborate on Secretary of State Antony Blinken’s comments that "humanitarian pauses must be considered," he said, "pauses in operation is a tool and a tactic" that can protect civilians for temporary periods of time.

Later when asked, Kirby said Blinken talked about the need to "consider the possibility of a humanitarian pause, to allow aid to get in -- and get in unfettered -- and to allow for the safe movement of people out."

-ABC News' Selina Wang