Israel-Gaza updates: More hostages released, including 4-year-old American girl

IDF and Hamas continued hostilities hours after reaching a deal for a temporary truce and the release of some of the hostages being held by Hamas.

Israel's Cabinet voted to agree to the deal with Hamas early Wednesday morning, however, the temporary cease-fire has not started yet. The cease-fire was expected to begin Thursday, however, in a late Wednesday night update, Israeli officials said it would start Friday and no hostages would be released until then.

The Israel Defense Forces confirmed in a statement early Wednesday that it "is continuing to operate in the Gaza Strip, including striking terrorist infrastructure, killing terrorists, and locating weapons."

"This morning, IDF troops neutralized a terror tunnel shaft from which a Hamas terrorist exited and fired at the soldiers," the IDF said. "Moreover, IDF troops identified terrorists and located weapons in a structure used by the Hamas terrorist organization. The troops killed the terrorists and destroyed the structure."

Rockets launched by militants continued to be fired toward Israel on Wednesday.

The deal between Israel and Hamas was mediated by Egypt, Qatar and the United States. Israeli law requires a 24-hour waiting period after the vote before the agreement can be put into action, during which time the Supreme Court of Israel may need to get involved in the event of any legal challenges. However, it is expected that the cease-fire and the prisoner swap will begin Thursday morning.

This post has been updated for clarity.

-ABC News' Joe Simonetti and Morgan Winsor

The "key" to securing the hostage deal between Israel and Hamas "was bearing down on both sides" to "get specific" on the details, according to U.S. National Security Advisor Jake Sullivan.

The agreement that was reached on Wednesday was mediated by the United States, Qatar and Egypt.

"The big move happened late last week when [U.S.] President [Joe] Biden spoke first with [Israeli] Prime Minister [Benjamin] Netanyahu and then with the emir of Qatar to say, how many hostages, for how any days in return for how many Palestinian prisoners," Sullivan told ABC News' George Stephanopoulos in an interview Wednesday on "Good Morning America."

"And it was really the work to refine those details that finally produced the breakthrough that we now see resulting in the announcement of a pause of hostilities and the first return of prisoners, of hostages," he added.

-ABC News' Morgan Winsor

3:08

Jake Sullivan said he believes 3 American hostages will be part of deal with Hamas

The U.S. national security adviser discusses Biden's role in the hostage deal between Israel and Hamas and the U.S. retaliatory airstrikes against Iran-backed militants.

ABCNews.com

The United States is "very hopeful" in the hostage deal between Israel and Hamas but "cannot be fully confident" until the abductees return home safely, according to White House National Security Advisor Jake Sullivan.

"You can never have full confidence until you actually see hostages back in the arms of their families," Sullivan told ABC News' George Stephanopoulos in an interview Wednesday on "Good Morning America."

"But I am very hopeful that there will be a pause, these hostages will begin to be released," he continued, "and then I am hopeful that we can build on the release of this initial 50 to get more hostages home so that every last person currently being held by the terrorist group Hamas gets home safely to their family."

3:08

Jake Sullivan said he believes 3 American hostages will be part of deal with Hamas

The U.S. national security adviser discusses Biden's role in the hostage deal between Israel and Hamas and the U.S. retaliatory airstrikes against Iran-backed militants.

ABCNews.com

The whereabouts of nine U.S. citizens and one U.S. permanent resident, or green card-holder, remains unknown in the wake of Hamas' Oct. 7 attack on Israel, according to Sullivan, who said it's unclear whether they were among the hundreds of people who were taken hostage and brought back to the neighboring Gaza Strip.

"We don't know for certain that all 10 are still alive and we’ve been honest about that -- what we know and what we don't know,” he added. "We know that among those 10, three are women and children -- two women one child. And we believe that those three will be among the 50 who are released."

But Sullivan cautioned: "Until we actually see them come out, be in the arms of their loved ones, get home safely, we cannot be fully confident. So we are going to wait as the families are waiting with bated breath until they come but and then until every last American comes out."

-ABC News' Morgan Winsor

President Joe Biden released a statement Tuesday night thanking Sheikh Tamim bin Hamad Al-Thani of Qatar and President Abdel-Fattah El-Sisi of Egypt for their "critical leadership and partnership" in helping to broker a deal between Hamas and Israel over the release of hostages.

Biden also thanked Israeli Prime Minister Benjamin Netanyahu for his commitment to the temporary pause ensuring the deal can be carried out and "bring home additional American hostages." Biden said he "will not stop until they are all released."

Senate Majority Leader Chuck Schumer said he was "pleased and relieved" over being "close" to seeing the release of the first 50 out of 240 hostages.

Schumer said he will continue working for the release of the remaining hostages, and called it a "positive development" that the pause in fighting will allow aid to flow to Palestinians in Gaza.

Biden said as president he has "no higher priority than ensuring the safety of Americans held hostage around the world."