Former Israeli Foreign Minister and former Knesset member Tzipi Livni spoke with ABC News Live about the recent Hamas attacks on Israel and argued the group is "not just an Israeli problem."

Livni said, "Hamas was always an obstacle to peace," and called on the entire international community to stand against them.

"They don't represent the Palestinian people," Livni said about Hamas. "They represent this extreme religious ideology that does not accept not only Israel, [but also] the U.S., or our liberal values, [and] democratic ideas."

She thanked President Joe Biden for his support of Israel shortly after he delivered remarks, and said that for Israelis listening it was "the first light in dark days."

-ABC News' Michelle Stoddart

The IDF said the first plane bringing U.S. ammunition landed in Israel Tuesday.

"We are grateful for the American backing and assistance to the IDF in particular, and to the State of Israel in general, during this challenging period," the IDF said in a statement.

-ABC News' Will Gretsky

U.S. intelligence "did not see anything that suggested an attack of this type was going to unfold" in Israel, national security adviser Jake Sullivan said Tuesday.

Sullivan wouldn't tell reporters if President Joe Biden and Israeli Prime Minister Benjamin Netanyahu discussed on their Tuesday call the possibility of an Israeli ground incursion into Gaza, and how that might affect American hostages.

Sullivan did defend Israel's targeting of Hamas sites in Gaza after being asked how long the U.S. would support the airstrikes, saying this is "not retaliation," but instead it’s "Israel standing up to defend itself.”

Sullivan also said that "at this point" there is no plan for the U.S. to put American troops on the ground to help Israel.

He added, "The president was very clear today that we will be making a request to the Congress, and it will include a request for funding for support to Israel. And he has also been equally clear that we are going to renew our request to the Congress for aid to Ukraine."

-ABC News' Justin Gomez

Israeli Prime Minister Benjamin Netanyahu said, in his conversation with President Joe Biden on Tuesday, he called Hamas' attack on Israel "barbarism that has not been seen since the Holocaust."

"Hundreds of people were slaughtered," including soldiers whose heads were cut off, Netanyahu said.

"Entire families were murdered in their beds and homes, women were brutally raped and murdered, [and] more than a hundred were kidnapped, including children," he said.

Netanyahu said he told Biden that "Hamas is worse than ISIS -- and that they should be treated that way."

Minister of Defense Yoav Gallant said Israeli soldiers have gained control of Israel's southern border "and are now moving on to a full-scale response."

"Anyone who decapitates citizens, or murders women and Holocaust survivors, will be eliminated. We will use all our force," Gallant said.

To the soldiers, Gallant said, "We have full confidence in you. It is thanks to the IDF that Israel exists."

The IDF said Israeli soldiers exchanged gunfire with terrorists in the Ashkelon industrial area in the last hour, killing at least three terrorists.

-ABC News' Will Gretsky