Israel-Gaza live updates: IDF says it's discovered one of Hamas' biggest tunnels

Jonathan Dekel-Chen, speaking on behalf of the family members of the eight Americans believed to be held hostage by Hamas, told reporters, “We could have no better friend in Washington or in the White House than President Biden himself and his administration.”

He said the families left their "terrific" meeting with Biden on Wednesday feeling the administration was "completely committed" to securing the release of their loved ones.

When asked for updates on their loved ones, the families declined to get into the specifics of the conversation.

But, Dekel-Chen said, "Today’s meeting with President Biden and Secretary [of State Antony] Blinken only reinforced that … they are willing and ready to do all that they possibly can, by any number of means, to get the hostages home."

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Families of American hostages issue remarks following meeting with Biden

Families have been pushing for more pauses in fighting to allow Israel to negotiate the release of remaining hostages.

ABCNews.com

Liz Naftali, the great aunt of Abigail, the 4-year-old Israeli-American hostage released last month, said, “Abigail is a miracle."

Naftali praised Biden and Blinken for their empathy.

"What the president and Secretary Blinken understand is that they're just not numbers and they're just not faces,” she said. “They are sons. They are grandparents. They are mothers."

"We are thankful to the president and to his team, because we know that they are working 24 hours a day and they are going to work through the holidays," she said. "They are going to do everything they can to make sure that all of our loved ones … come home."

-ABC News’ Molly Nagle and Fritz Farrow

Children's vaccines have run out completely in Gaza, according to the Gaza Ministry of Health.

This "will cause catastrophic health repercussions on children's health and the spread of diseases, especially among the displaced in overcrowded shelter centers," Gaza Health Ministry spokesman Dr. Ashraf Al-Qudra warned.

President Joe Biden met privately Wednesday with families of Americans taken hostage by Hamas, according to the White House.

Participants included: Yael Alexander, Adi Alexander, Ruby Chen, Roy Chen, Ronen Neutra, Orna Neutra, Jonathan Dekel-Chen, Gillian Kaye, Aviva Siegel, Elan Siegel, Shir Siegel, Hanna Siegel and Liz Naftali.

Secretary of State Antony Blinken and Jon Finer, White House deputy national security adviser, also participated in the meeting.

Jon Polin and Rachel Goldberg, whose 23-year-old son, Hersh, was taken hostage, and Iris Haggai, whose parents were believe to be kidnapped, joined the meeting by phone.

-ABC News’ Molly Nagle

The U.S. has announced another round of sanctions against Hamas officials, including key operatives in Turkey who allegedly worked to transfer money into Gaza to fuel Hamas operations.

These sanctions, imposed in coordination with the United Kingdom, are the fourth round imposed by the U.S. since Hamas’ Oct. 7 attacks on Israel.

The sanctions reflect the administration’s "commitment to dismantling networks that support Hamas funding streams as part of our continuous effort to prevent and deter its terrorist activity," State Department spokesperson Matt Miller said in a statement.

-ABC News’ Shannon Crawford