Israel-Gaza updates: IDF says it exposed Hamas tunnel under Shifa Hospital

U.S. National Security Council spokesperson John Kirby told ABC News on Thursday that "there's still working going on, literally by the hour," to secure the release of the remaining hostages being held by Hamas in the Gaza Strip.

"We've got folks on the ground. We've been talking to them, our negotiators are talking to their negotiators and we're working on this really, really hard," Kirby said during an interview on "Good Morning America."

"I don't have an announcement to make today," he added. "But, as the president said yesterday, we're hopeful that we can actually get a good result here."

-ABC News' Morgan Winsor

During an interview Thursday on ABC News' "Good Morning America," U.S. National Security Council spokesperson John Kirby was asked whether Israel's raid on the largest hospital in the Gaza Strip was justified.

"Well, the raid, they're going in on the ground here. They're not bombing it," Kirby said. "They're going after the Hamas leadership that is there. This presents a real dilemma for them."

"Hamas is using that hospital as a command and control mode and as a way to store weapons, and even house their fighters. Israel has to do something about that threat," he continued. "But they also have an added burden of protecting the civilians, the medical staff, the doctors and the patients that are at that hospital. And they are trying hard to strike that balance."

The IDF alleges that Hamas has placed its command centers under Al-Shifa and other hospitals in Gaza and is deliberately sheltering behind Palestinian civilians -- claims that the militant group denies.

Kirby told a press gaggle on Tuesday that the U.S. has intelligence that Hamas has used Gaza's hospitals, including Al-Shifa, to support its military operations and hold hostages.

-ABC News' Morgan Winsor

Israeli ground troops continued to carry out a raid on the largest hospital in the Gaza Strip for a second day.

A spokesperson for the Israel Defense Forces told ABC News that, as of 1 p.m. local time on Thursday, soldiers were still inside Al-Shifa Hospital in Gaza City, some 34 hours after launching the raid.

The IDF spokesperson also confirmed that they found explosives inside the medical complex.

The IDF alleges that Hamas has placed its command centers under Al-Shifa and other hospitals in Gaza and is deliberately sheltering behind Palestinian civilians -- claims that the militant group denies.

-ABC News' Dana Savir and Morgan Winsor

Negotiations are progressing towards a U.S. and Qatari-brokered hostage release deal between Israel and Hamas, according to multiple officials in the U.S. and Israel.

The potential deal could see Hamas free dozens of Israeli hostages taken on Oct. 7 in exchange for Israel's release of jailed Palestinians and occur during a multi-day cease-fire in Gaza, the officials said.

The contours of that deal are still being worked out, including how many Israeli hostages would be released and how long a cease-fire would last.

Multiple officials in the U.S. and Israel told ABC News that the current figure is at least 50 Israeli hostages -- women, children and the elderly -- would be released, though the exact number is not yet final. This would likely take place in batches, with hostages released in exchange for a yet unspecified number of Palestinian women and minors held in Israeli jails, the officials said.

The cease-fire could last between three and seven days though the length is being negotiated and remains a sticking point, the officials said.

There would be other Israeli concessions as well, potentially including the delivery of fuel into Gaza, according to the officials.

Two U.S. officials told ABC News that an agreement seems to be within reach, but that multiple similar proposals have fallen apart just before reaching the finish line in recent weeks.

-ABC News' Matt Gutman, Jordana Miller and Shannon K. Crawford