Israel-Gaza updates: Biden speaks with Netanyahu about hostages' release, Gaza humanitarian assistance
The hostages are two elderly women who are both Israeli nationals.
Thousands of people have died and thousands more were injured after the militant group Hamas launched an unprecedented surprise attack on Israel on Oct. 7 and Israel retaliated with a bombing campaign and total siege of the neighboring Gaza Strip, leaving the region on the verge of all-out war.
At least 1,400 people have died and 4,629 others have been injured in Israel, according to Israeli authorities. In Gaza, 5,087 people have died and 15,273 have been wounded, according to the Palestinian Health Authority.
Aid workers and officials fear that Israel's call for an evacuation of the northern part of Gaza is precipitating a humanitarian disaster as electricity and other supplies have been cut off in preparation for what appears to be an imminent ground offensive.
Humanitarian groups have urged Israel to call off the evacuation and agree to a cease-fire, even as the country has asserted a right to defend itself -- a right the United States endorses.
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Israeli forces preparing for air, ground, sea operations
Israeli forces are "preparing thoroughly for the next step -- a multilateral operation in the air, ground and sea," Israeli Defense Minister Yoav Gallant said Monday.
To the soldiers, Gallant said in Hebrew, "Keep preparing for our operation, it will come soon."
"Do your work, get ready," he said. "We will need you.”
Gaza death toll tops 5,000
In the last 24 hours, at least 436 people have been killed in Gaza, according to the Gaza Health Authority, which is run by Hamas.
The Gaza death toll has now climbed to 5,087 since Hamas' Oct. 7 attack on Israel, according to the Palestinian Health Authority.
Cousins of freed American hostages speak out
Ayelet and Or Sella recalled to ABC News the moment they were finally able to embrace their cousins Judith and Natalie Raanan at home in Israel one day after the mother and teenage daughter were released by Hamas kidnappers.
"I realized I hadn't breathed for two weeks," Ayelet said.
"I've never felt a hug this intense in my life," Or added.
But eight of their family members are still being held hostage.
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Hundreds of Gaza targets struck overnight, Israel says
The Israeli military struck more than 320 targets in Gaza overnight, the Israel Defense Forces said Monday.
At least 40 people were killed and dozens more were injured in two Israeli airstrikes in northern Gaza, the Palestinian Interior Ministry said.
The Jabalia refugee camp, where most of those killed were women and children, was among the targets, Palestinian officials said.
-ABC News' Joe Simonetti
'Unprecedented catastrophe' unfolding in Gaza: UN
Philippe Lazzarini, commissioner-general of the United Nations Relief and Work Agency, is urging the foreign ministers of the Organization of Islamic Cooperation "to firmly and unconditionally support the humanitarian efforts to safeguard civilians in Gaza."
"An unprecedented catastrophe is unfolding" in Gaza, Lazzarini said in a statement on Wednesday.
Thousands of civilians have been killed, including women and children, and at least 1 million people have been forced from their homes yet remain trapped in Gaza as food, water and medicine supplies dwindle.
"Not one shipment of aid has been allowed into the Gaza Strip since the start of this conflict due to the full siege imposed," he said.
Lazzarini asked for an immediate end to attacks "targeting civilians and civilian objects, including UN and humanitarian personnel and premises."
He said the delivery of the urgent aid that's needed "can be achieved through an immediate humanitarian ceasefire to allow without further delay, unimpeded and safe access to humanitarian assistance."
He continued, "UNRWA must receive adequate resources. The Agency is short of US$ 100 million for its core budget for this year. … Additionally, UNRWA has issued a Flash Appeal of US$ 104 million for its immediate emergency response to more than a million displaced and vulnerable Palestine Refugees. This appeal will most likely soon be revised upwards."