Secretary Blinken and Prime Minister Netanyahu met earlier this morning behind closed doors and are now meeting with the Israeli War Cabinet, according to the pool producer on the ground.

"Prime Minister Benjamin Netanyahu is now holding a private meeting with US Secretary of State Antony Blinken, at the Kirya in Tel Aviv. They will also meet with the members of the War Cabinet," the Israeli PM tweeted.

U.S. Secretary of State Antony Blinken descended the plane stairs and greeted newly sworn-in Ambassador Jack Lew and the former Chargé d’Affaires, now Deputy Chief of Mission Stephanie Hallett, as he arrived in Tel Aviv on Friday morning.

Israeli Ministry of Foreign Affairs (MFA) Chief of State Protocol Gil Haskel and MFA North Americas Bureau Director Yaron Sideman also welcomed the secretary.

Blinken will meet with Prime Minister Netanyahu, members of the Israeli War Cabinet and President Herzog this morning and will hold a press availability at 8 a.m. ET (2 p.m. local) after the meetings.

Hezbollah leader Sayyed Hassan Nasrallah is scheduled to speak publicly Friday to people in Ashura Square in Beirut, Lebanon.

The speech is expected to start 3 p.m. local time

Nasrallah will likely appear to the crowd in Beirut via a screen and not in person. He has not appeared in person on the street since 2006.

-ABC News' Ellie Kaufman, Marcus Moore and Bruno Roeber

Pentagon spokesperson Brig. Gen. Pat Ryder reiterated the administration's calls for a humanitarian pause over a ceasefire.

We do not support a ceasefire, in that gives time for Hamas to regroup which is something that again, would put Israeli citizens and others in danger," he said. "You have heard however, the president say that the U.S. government does support humanitarian pauses to enable humanitarian aid to get in, for hostages to get out as well as other citizens."

"So in the [Defense] Secretary's discussion with his counterparts, ensuring that innocent civilians in Gaza are able to get humanitarian assistance, whether that be water fuel, medical aid ... that continues to be something that we continue to emphasize regularly," Ryder added.

Ryder added that the U.S. continues to speak to Israel about the importance of safeguarding civilian lives in its operations in Gaza, which includes the principle of proportionality, while acknowledging that Israel has a right to self-defense and is dealing with an existential threat.

-ABC News' Luis Martinez

Doctors Without Borders called for a ceasefire Saturday saying the conflict has reached "a new low in an endless stream of unconscionable violence." The organization, which has been providing medical care to people in Gaza, also condemned world leaders for not calling for a ceasefire.

"The deadly attack outside the gate of Al-Shifa hospital impacting an ambulance is horrendous. This is a lethal attack outside Gaza's main and busiest hospital, where our staff work daily to provide lifesaving medical care. We have repeatedly called for an immediate and total ceasefire, for the protection of healthcare facilities, as well as medics, patients and people who are taking shelter there," Doctors Without Borders said in a statement Saturday.

"This is a new low in an endless stream of unconscionable violence. The repeated strikes on hospitals, ambulances, densely populated areas and refugee camps are disgraceful. How many people have to die before world leaders wake up and call for a ceasefire?" Doctors Without Borders said.

This comes as the Palestinian death toll rises to 9,488 -- including 3,900 children and 3,509 women -- and 24,158 Palestinians were injured, according to the Hamas-run Gaza Health Ministry.

One physician described seeing an ambulance hit outside Al-Shifa hospital.

"We were standing inside the hospital gate when the ambulance was directly hit in front of us. There were bloody bodies everywhere. Many were killed immediately, while we rushed others to the operating room for emergency care," Dr. Obaid, a Doctors Without Borders doctor at Al Shifa hospital, said.

The Israel Defense Forces claimed its aircraft hit an ambulance that it believes was being used by Hamas and called for civilians to move south for safety.

-ABC News' Cindy Smith and Emma Ogao