Hamas released a video on Sunday showing three Israeli hostages who are still being held in captivity in Gaza.

The three hostages that appear in the video are 26-year-old Noa Argamani, 35-year-old Itai Svirsky and 53-year-old Yossi Sharabi.

The video released by Hamas called on Prime Minister Benjamin Netanyahu to end the war on Gaza.

-ABC News' Ellie Kaufman

President Joe Biden on Sunday marked 100 days since Hamas launched its deadly attacks on Israel on Oct. 7, vowing to get more of the American hostages freed.

"For 100 days, they have existed in fear for their lives, not knowing what tomorrow will bring," Biden said of the hostages held by Hamas in Gaza.

"For 100 days, their families have lived in agony, praying for the safe return of their loved ones," Biden added, saying the families have been "at the forefront of my mind."

"No one should have to endure even one day of what they have gone through, much less 100," he said.

"We will never stop working to bring Americans home," Biden pledged.

-ABC News' Fritz Farrow

As the Israel-Hamas war reached its 100th day Sunday, the Israel Defense Forces says it's goals "will take a long time" to achieve.

"To achieve real results, we must continue to operate in enemy territory, not to allow extortion attempts for a cease-fire," IDF Lt. Gen. Herzi Halevi said in a televised address Saturday.

"We must continue applying pressure and that is exactly what we are doing," he said. "[Our] goals are complex to achieve and will take a long time. To dismantle Hamas, patience is both necessary and essential."

The IDF also said it's now moving to intensify its operations in southern Gaza, where it believes Hamas' leadership is hiding.

-ABC News' Patrick Reevell

The U.S. ambassador to Israel, Jack Lew, addressed a rally in Tel Aviv on Sunday demanding the immediate return of the hostages still being held by Hamas.

"One day is too many -- 100 days is unfathomable," Lew told the crowd. "My heart aches for all who have been affected by Oct. 7 and I stand in solidarity, as does the United States, with the families of the hostages. I add my voice to theirs to say: Bring them home now."

Tens of thousands of Israelis have rallied over the last 24 hours to demand the return of the hostages on the 100th day of their captivity.

-ABC News’ Patrick Reevell

The Israel Defense Forces claimed on Sunday that it has "completed the dismantling of Hamas' military framework" in the northern Gaza Strip, hitting hundreds of targets and taking out key leaders of the terrorist group.

In an assessment of the first three months of the war between Israel and Hamas, Rear Adm. Daniel Hagari, an IDF spokesperson, said Israeli forces have met their goals through airstrikes, ground operations and intelligence gathering in the primary objective of eliminating Hamas.

He said the IDF's efforts in northern Gaza have included a relentless barrage of missile strikes, most of them targeting Jabaliya, the onetime stronghold of Hamas. In Jabaliya alone, Hagari said IDF airstrikes had hit 670 targets before ground forces entered the area and another 300 targets after ground troops moved in and helped direct precision airstrikes.

"In these strikes in the Jabaliya area, we eliminated the battalion commander, the deputy brigade commanders, and 11 company commanders leading the terrorists in the field," Hagari said during a news conference.

Among the Hamas commanders eliminated was Ahmad Randor, Hagari said, showing what he said was a photograph of Randor sitting with his command echelon in a bunker 40 meters, or about 131 feet, underground.

"We have completed the dismantling of Hamas' military framework in the northern Gaza Strip and will continue to deepen the achievement, strengthening the barrier and the defense components along the security fence," Hagari said.

Since the war started, IDF forces have located and destroyed 40,000 weapons across the Gaza Strip, some of which were found in schools, hospitals, mosques, and even under the beds of children, Hagari said. In Jabaliya, IDF troops also infiltrated about 5 miles of tunnels and more than 40 tunnel shafts leading to Hamas' northern headquarters and retrieved the bodies of five hostages, according to Hagari.

"Hamas no longer operates in an organized manner in this area. We have deprived it of its main terror capabilities in the region," Hagari said.

He noted that while there are still terrorists in the Jabaliya area, "they now operate without a framework and without commanders."

-ABC News' Jordana Miller