Israel-Gaza updates: Gantz rejects Netanyahu's request, resigns

Amid an escalation of fighting and bombing in Gaza, at least 70 are dead and over 300 wounded in the last 48 hours, according to Doctors Without Borders.

"We have seen hospitals being bombed. We have seen refugee camps being bombed. We have seen humanitarian warehouses being bombed. The situation is apocalyptic," Karin Huster, a Doctors Without Borders nurse, said in a statement Wednesday.

"While the Rafah crossing point remains closed, these repeated mass casualties incidents are bringing the health system to the point of collapse," Doctors Without Borders said in a statement.

Medical teams at Al-Aqsa hospital -- one of the only remaining functional health facilities in central Gaza -- have received a huge influx of patients, many of whom arrived with severe burns, shrapnel wounds, fractures and other traumatic injuries.

"The odor of blood in the hospital's emergency room this morning was unbearable. There are people lying everywhere, on the floor, outside... bodies were being brought in plastic bags. The situation is overwhelming," said Huster.

-ABC News’ Guy Davies

The U.S. continues to push Hamas to agree to the cease-fire proposal President Joe Biden outlined Friday, saying Hamas' stated opposition to the deal has yet to be officially transmitted.

"We've seen some public comments from Hamas officials, but we have not yet gotten an official response from Hamas to the Qataris, who are the mediator to whom Israel gave their proposal that was transmitted to Hamas," White House national security adviser Jake Sullivan told ABC's George Stephanopoulos on "Good Morning America" Wednesday.

"The ball is in Hamas's court," Sullivan continued. "Israel has accepted the proposal. The world has endorsed the proposal. Now it's time for Hamas to say yes to it."

Sullivan argued the latest multi-phase proposal is key to ending the war, returning hostages, and increasing the flow of aid into Gaza, while ensuring Israel's security and a better future for Palestinians.

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One-on-one with National Security Advisor Jake Sullivan

The White House National Security adviser joins us from France, where President Joe Biden is attending events marking the 80th Anniversary of the D-Day invasion at Normandy.

"That's what's on offer," Sullivan said. "That's what Hamas needs to step up and take and we're awaiting to get their official response."

Asked whether Biden thinks Israeli Prime Minister Benjamin Netanyahu was prolonging the war for political gain — which he suggested in a Time magazine interview out Tuesday — Sullivan pointed to Biden's answer to a question Tuesday evening asking if Netanyahu was playing politics.

"I don't think so. He's trying to work out the serious problem he has," Biden said Tuesday.

"And from our perspective, we're not going to delve into Israeli politics," Sullivan added. "What we're going to do is focus on the fundamental task at hand, which is President Biden's effort to end this war, get the hostages home, make sure Israel's safe and make sure the Palestinian people have a decent future."

-ABC News' Fritz Farrow

Security officials from Egypt, the United States and Qatar will meet in Doha on Wednesday to look at ways to revive the Gaza truce negotiations, a senior Egyptian official told Egyptian state media.

Hamas rejected the Israeli cease-fire plan endorsed by President Joe Biden on Tuesday, saying they won't agree to anything until Israel commits to halting all military operations in Gaza.

-ABC News' Ayat Al-Tawy

World Central Kitchen has now served 50 million meals in Gaza, the organization announced during a press briefing Tuesday.

"I'd like to announce that we have just crossed the 50 million meal mark in Gaza. That is a huge accomplishment for us. We're about 50,100,000 right now. As many of you know, we had to pause our work in Gaza after the Israeli attack on our personnel convoy on April 1, which killed seven of our colleagues," World Central Kitchen Chief Communications Officer Linda Roth said during the press conference.

"Jose, our founder, says the decision to restart feeding in Gaza was both the hardest and the simplest one we could make," Roth said.

Right now, the organization has two main World Central Kitchen kitchens operating in Gaza in Deir al Balah and Mawasi, and "another 65 community kitchens spread throughout the strip," Roth said.

"We have about 400 Palestinian Response Corps members and hundreds and hundreds of more volunteers that are working to feed everyone in Gaza. It's Palestinians feeding Palestinians," Roth said.

-ABC News Guy Davies and Nadine Shubailat