Updated

President Biden and Vice President Harris plan to meet in the White House Situation Room on Monday along with the U.S. hostage deal negotiating team after the murder of six hostages, including American citizen Hersh Goldberg-Polin, by Hamas on Saturday.

The White House said the focus of the meeting is to discuss efforts to drive toward a deal that secures the release of the remaining hostages. The meeting is also closed to the press.

Mobs of protesters took to the streets in Jerusalem, Tel Aviv and other cities on Sunday after the bodies of the hostages in Gaza were returned to Israel, fueling frustration and anger toward the country’s leadership for failing to achieve a cease-fire deal freeing the remaining hostages.

Israeli media reported that the crowds of protesters were estimated to be up to 500,000 in major Israeli cities. Many of the protesters demanded Prime Minister Benjamin Netanyahu do more to bring home the remaining 101 hostages.

ISRAEL'S LARGEST LABOR UNION PLANS MASSIVE STRIKE AFTER SIX HOSTAGES' BODIES RECOVERED

Israel protest

Protesters in Tel Aviv, Israel, on Sept. 1, 2024, rally against the government and show support for the hostages who were kidnapped by Hamas on Oct. 7. (Reuters/Florion Goga)

Reuters reported that Israel’s leadership estimates that nearly a third of the remaining hostages are dead.

While protests remained strong on Sunday, labor leaders called on workers to be part of a one-day strike Monday.

"We are getting body bags instead of a deal," Histadrut Labor Federation chief Arnon Bar-David said to reporters on Sunday, according to Reuters. "We must reach a deal. A deal is more important than anything else."

AMERICAN HOSTAGE HERSH GOLDBERG-POLIN, 5 OTHERS 'BRUTALLY MURDERED' BY HAMAS RIGHT BEFORE RESCUE: IDF

Man arrested during protest in Israel

Law enforcement officers detain a demonstrator during a rally against the government in Tel Aviv, Israel, on Sept. 1, 2024. (Reuters/Florion Goga)

The Histadrut Labor Federation is Israel's main labor union that represents hundreds of thousands of workers. Bar-David's call for a one-day strike was supported by manufacturers and tech entrepreneurs in the country.

Israel’s military announced that the bodies of hostages 40-year-old Carmel Gat, 23-year-old Hersh Goldberg-Polin, 24-year-old Eden Yerushalmi, 32-year-old Alexander Lobanov, 27-year-old Almog Sarusi and 25-year-old Ori Danino were recovered from a tunnel in the southern Gazan city of Rafah.

A polio vaccination campaign had begun in the war-torn Gaza Strip, which sparked violence in the occupied West Bank.

ISRAEL RECOVERS 6 DEAD HOSTAGES IN 'COMPLEX RESCUE OPERATION,' SAYS BODIES HELD UNDER HUMANITARIAN AREA

Tel Aviv water canon

Police use a water cannon during a protest in Tel Aviv, Israel, on Sept. 1, 2024. (Reuters/Tomer Appelbaum)

The bodies of the six hostages have since been returned to Israel, according to military spokesperson Rear Adm. Daniel Hagari.

An Israeli health ministry spokesperson said a forensic analysis of the bodies determined the hostages were "murdered by Hamas terrorists in a number of shots at close range" 48 to 72 hours prior.

NETANYAHU MOURNS DEATHS OF 6 HOSTAGES RECOVERED IN GAZA, VOWS TO 'SETTLE ACCOUNTS' WITH HAMAS

Tel Aviv protests

Protesters block a main road in Tel Aviv, Israel, amid the ongoing conflict in Gaza between Israel and Hamas on Sept. 1, 2024. (Reuters/Florion Goga)

After learning of the news, protesters blocked streets in Jerusalem and held a demonstration outside Netanyahu’s residence. In Tel Aviv, protesters blocked the main highway while holding flags with images of the murdered hostages.

During the protests, police reportedly arrested about two dozen Israelis nationwide, Reuters reported.

DEFENSE MINISTER SAYS ISRAEL MUST 'WIDEN THE GOALS' OF WAR TO RETURN RESIDENTS TO THE NORTH

Tel Aviv Protesters

Protesters rally in Tel Aviv after the bodies of six hostages were returned to Israel on Sept. 1, 2024. (Reuters/Florion Goga)

After the hostages' bodies were recovered, Netanyahu said in a statement that he was "shocked to the core" by the murders.

"He who murders abductees does not want a deal. We are in a difficult day. The heart of the entire nation was torn," Netanyahu said. 

Person being moved by police

Israeli security forces remove a person during a demonstration outside the prime minister's office in Jerusalem on Sept. 1, 2024. (REUTERS/Ronen Zvulun)

"Along with all the citizens of Israel, I was shocked to the core by the terrible cold-blooded murder of six of our abductees."

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War has been raging in the Middle East since Oct. 7, when Hamas launched a series of attacks on Israel, sparking Israel to declare war soon afterward. An estimated 257 Israeli hostages were trapped in Gaza when the war first began, and 101 hostages are still in Gaza. Of the 101 remaining hostages, 66 are believed to be alive, four of whom are American citizens.

Fox News Digital’s Landon Mion, Emma Colton and Reuters contributed to this report.