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

President Joe Biden on Wednesday emphasized U.S. support for Israel's right to defend itself, while also urging the country to do "everything in its power" to protect innocent people in Gaza.

"We will ensure Israel has what it needs to defend itself," Biden said during a press conference at the White House with Australia's prime minister.

Biden said Hamas is using Palestinian civilians as human shields, putting an "added burden on Israel while they go after Hamas," but Israel should still do everything it can to follow the "laws of war."

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What is Hamas?

Hamas is an Islamic political and militant organization that controls the Gaza Strip.

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"Israel has to do everything in its power, as difficult as it is, to protect innocent civilians," he said.

Biden also said the flow of aid to Gaza needs to increase and that he was working “around the clock” to secure the release of hostages.

He reiterated his support for a two-state solution, saying that the status quo will never return after Hamas' Oct. 7 attack on Israel.

"I'm convinced one of the reasons Hamas attacked when they did -- I have no proof of this, my instinct tells me -- is because of the progress we were making toward regional integration for Israel and regional integration overall. And we can't leave that work behind,” Biden said, repeating a claim he’s made before about his efforts to broker a broader deal between the U.S. and Saudi Arabia that would lead to Saudi Arabia recognizing Israel.

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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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-ABC News' Cheyenne Haslett

Israeli forces are getting ready for the ground operation into Gaza, but will not tell anyone when it will be, Prime Minister Benjamin Netanyahu said Wednesday.

When soldiers enter Gaza, they'll "exact the full price from these murderers," Netanyahu said in Hebrew.

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Thousands of ultra-orthodox Jewish men sign up for IDF

Typically, ultra-orthodox Israelis are exempt from military service.

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"I once again call on the uninvolved population in Gaza to evacuate to the southern strip," he said.

Netanyahu also said Israel will "do everything possible to bring hostages home."

"We are gathering the support of world leaders," he added. "Our fight against Hamas is also their fight."

Shelters in Gaza are four times over their capacities, forcing many people to sleep in the streets, according to the United Nations Relief and Works Agency for Palestine Refugees in the Near East.

Nearly 600,000 displaced Gaza residents are sheltering at 150 UNRWA facilities, the agency said.

Tuesday marked the deadliest day in Gaza since the Hamas-Israel conflict began on Oct. 7, according to the United Nations Office for the Coordination of Humanitarian Affairs.

At least 700 people died on Tuesday, OCHA said.

Over 6,500 people have died in Gaza since Oct. 7, according to the Hamas-controlled Gaza Health Ministry.