Israel-Gaza updates: Biden speaks with Netanyahu about hostages' release, Gaza humanitarian assistance

The U.S. is planning is impose new sanctions on several Hamas leaders this week, according to a U.S. official.

The Treasury Department is planning to announce the sanctions this week, the official said.

Earlier Tuesday, a top Treasury official pledged that the agency would "bring our tools to bear against Hamas' financing and the overall funding of terrorism."

"Disrupting Hamas' financing operations is not new to us; this has been a priority for Treasury for decades," Under Secretary for Terrorism and Financial Intelligence Brian Nelson said at a news conference. "We are equipped to target this infrastructure and its supporters, whether they be political leadership, operatives, facilitators, financiers, investors, or entire global procurement networks."

Axios first reported this development Tuesday night.

-ABC News' Ben Gittleson and Elizabeth Schulze

President Joe Biden released a statement saying he was "outraged and deeply saddened by the explosion at the Al Ahli Arab hospital in Gaza, and the terrible loss of life that resulted."

"Immediately upon hearing this news, I spoke with King Abdullah II of Jordan, and Prime Minister Netanyahu of Israel and have directed my national security team to continue gathering information about what exactly happened. The United States stands unequivocally for the protection of civilian life during conflict and we mourn the patients, medical staff and other innocents killed or wounded in this tragedy," he said.

-ABC News' Ben Gittleson

The Biden administration is preparing a foreign aid package for $100 billion that will include assistance for Israel, two people familiar with the details told ABC News.

Details on the spending request were still being finalized ahead of an official request sent to Congress later this week, according to the sources.

The specifics of the aid package are now circulating among U.S. officials, according to sources.

One source told ABC News the "bulk" of the assistance will likely go toward Ukraine, while another person with knowledge of the proposal said the latest draft included $10 billion for Israel, as requested.

-ABC News' Anne Flaherty, Ben Siegel, and Allison Pecorin

Palestinian Authority President Mahmoud Abbas blamed Israel for the attack on the Gaza hospital that has left over 500 people dead.

Abbas called for "unity" for all Palestinians in a speech delivered early Wednesday morning local time.

"Nobody will use division but the enemy of the Palestinian people," he said.

Abbas claimed the world was "silent" and called on the U.S. Security Council and others to condemn the attack.

"We warn the international community of the crimes of the Israeli occupations. [and] in this tough moment, to make the Israeli accountable and to protect the Palestinian people," he said.

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Strike on Gaza hospital kills at least 500 people: Gaza Health Ministry The Israel Defense Forces denied responsibility for the attack, saying a failed launch by the Palestinian Islamic Jihad caused the blast.

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