Hospitals in Gaza are "horrific scenes," filled with killed and injured children and "medical staff working 24/7 with almost nothing in terms of resources and equipment," said Dr. Ashraf al-Qudra, a spokesman for the Health Ministry in Gaza.

Seventy-percent of the victims are children, women and the elderly, according to the health ministry.

The ministry said 12 hospitals and 32 health centers are out of service, with those numbers expected to rise as airstrikes continue and Gaza runs out of fuel.

"It's dire as it can be. The scenes inside the hospital are almost indescribable -- one of our doctors recently had to do an operation on the floor, in the corridor of the hospital, because there was nowhere to do it. The situation is untenable, absolutely horrific," al-Qudra said.

After Yocheved Lifschitz, 85, was taken hostage by Hamas militants, she was brought into a "huge network" of underground tunnels, which she described on Tuesday as being "like a spider's web."

"I've been through hell," Lifschitz told gathered reporters in the lobby of the Tel Aviv hospital where she's being treated. As Lifschitz spoke in Hebrew, her daughter translated her words into English.

The 85-year-old had been taken by motorcycle on Oct. 7, carried away through fields while her captors struck her with sticks and removed her watch and jewelry, she said. She was made to walk a few kilometers to the entrance of one of the many tunnels Hamas has built under Gaza.

She said she was kept during her captivity in a "clean" location, where doctors visited every few days. Medicine was available, she said.

She slept on a mattress on one of the tunnel's floors. She ate white cheese, cucumbers and pita bread, she said.

-ABC News' Joe Simonetti and Bruno Nota

The Israel Defense Forces said Tuesday morning that three Hamas deputy commanders were killed Monday night.

“During the night, IDF aircraft also attacked operational headquarters used by operatives of the terrorist organization Hamas and assembly points of the terrorist organization located inside mosques,” the IDF said in a post on X (formerly Twitter).

The deputy commander of the Nusirat battalion, the deputy commander of the Shati battalion and the deputy commander of the Alfurkan battalion of Hamas were killed, the IDF said in the post.

President Joe Biden spoke with Israel’s Prime Minister Benjamin Netanyahu on Monday afternoon, once again addressing his commitment to efforts to “secure the release of all remaining hostages taken by Hamas – including Americans – and to provide for safe passage for U.S. citizens and other civilians in Gaza,” according to a White House readout of the call. Biden welcomed the news of the two hostages who were released earlier on Monday, per the readout.

During the call, Biden also “underscored the need to sustain a continuous flow of urgently needed humanitarian assistance into Gaza,” according to the readout.

Biden also spoke with Netanyahu about U.S. support for Israel and what the White House said was “ongoing efforts at regional deterrence, to include new U.S. military deployments.”

-ABC News’ Ben Gittleson

White House national security spokesperson John Kirby said Tuesday a "ceasefire right now really only benefits Hamas."

When asked if the U.S. has set or discussed any red lines with the Israelis, he said simply, "No."

But when pressed to elaborate on Secretary of State Antony Blinken’s comments that "humanitarian pauses must be considered," he said, "pauses in operation is a tool and a tactic" that can protect civilians for temporary periods of time.

Later when asked, Kirby said Blinken talked about the need to "consider the possibility of a humanitarian pause, to allow aid to get in -- and get in unfettered -- and to allow for the safe movement of people out."

-ABC News' Selina Wang