Hamas militants have taken at least 199 hostages since their ground invasion into Israel began on Oct. 7, a spokesperson for the Israeli military said on Monday.

-ABC News' Clark Bentson

Israeli Prime Minister Benjamin Netanyahu's office said on Monday that there was no cease-fire agreement ahead of the expected re-opening of an Egyptian border in Rafah.

"There is no ceasefire," the office said in a two-line statement.

Israelis residents living near the border with Lebanon will be evacuated, state officials said Monday.

People living within the 28 Israeli towns that sit within 2 km of the border will be evacuated, the Israeli Ministry of Defense's National Emergency Management Authority and the Israel Defense Forces said in a joint statement.

-ABC News' Clark Bentson

U.S. Secretary of State Antony Blinken on Monday reaffirmed the U.S.'s commitment to Israel "as it defends itself."

"The United States is also actively working to ensure the people of Gaza can get out of harm's way and the assistance they need -- food, water, medicine -- can get in," he said on social media. "Hamas does not care if Palestinians suffer."

The secretary is expected on Monday to travel to Israel to meet with Prime Minister Benjamin Netanyahu.

"Over the past few days, I've traveled to Israel, Jordan, Bahrain, Qatar, UAE, Saudi Arabia, and Egypt," Blinken said. "What I've heard from every partner is a shared view to prevent the conflict from spreading, to safeguard innocent lives, and to get assistance to those in Gaza who need it."

-ABC News' Lauren Minore

Human Rights Watch has accused Israel of using white phosphorus munitions in military operations in Gaza on Wednesday, saying it violated international humanitarian law by putting civilians at unnecessary risk.

In a report released Thursday, Human Rights Watch said it based its determination on a video it said it has verified, as well as two eyewitness accounts.

The Israel Defense Forces said in a statement to ABC News that claims they used white phosphorus in Gaza are "unequivocally false."

ABC News geolocated a video showing a jellyfish-shaped plume of white smoke over the port of Gaza. The video was posted on Wednesday by the official Palestinian news agency WAFA and matches images posted on social media and by other news outlets on the day.

Two experts -- Amael Kotlarski, the weapons team manager for the defense intelligence firm Janes, and Amnesty International weapons investigator Brian Castner -- told ABC News that images suggested munitions deployed over the port of Gaza on Wednesday appeared to contain white phosphorus.

"We have verified that Israeli artillery forces striking Gaza are equipped with M825 and M825A1155mm white phosphorus projectiles," Castner told ABC News, pointing to photographs by an Anadolu Agency photographer taken on Monday and showing Israeli troops handling shells labeled "M825A1."

Kotlarski said visual evidence alone was not sufficient to confirm that these specific shells were used in the Gaza port strikes.

There are "perfectly legal" military uses for white phosphorus munitions, Kotlarski said, including to create a smoke screen to conceal movements, to mark targets for artillery or air strikes, or to illuminate a battlefield. However, its use in urban areas is "problematic due to the higher risk of collateral damage," Kotlarski said, including the munitions' potential to cause severe burns.

White House Principal Deputy Press Secretary Olivia Dalton said Friday the U.S. had not independently verified allegations Israel used white phosphorous "so that is not something I would want to speculate about or weigh in on at this time."

-ABC News' Christopher Looft, Ben Gittleson and Jordana Miller