At a news conference Thursday, Secretary of State Antony Blinken was asked about the gruesome photos and videos shown to him behind closed doors by Israeli Prime Minister Benjamin Netanyahu.

"It’s beyond what anyone would ever want to imagine, much less, God forbid, experience. A baby, an infant -- riddled with bullets. Soldiers beheaded. Young people, burned alive," he said. "I could go on, but it’s simply depravity in the worst imaginable way."

Blinken said that some of the images had been seen before, but others were new to him, and again said that Hamas’ acts harkened back to ISIS.

"I think for any human being to see this -- it’s really beyond almost anything that we can comprehend, digest," Blinken continued. "You can’t help but imagine yourself, your family, your loved ones, your friends in that situation, in that predicament and maybe the best word for it for me is overwhelming."

While some of the claims made by the IDF have been questioned and others have fueled online claims that the Israeli government is spreading disinformation, Blinken said that the photos would ultimately show exactly the horrors its people have confronted and serve to unify through "moral clarity."

-ABC News' Shannon Crawford

The Israel Defense Forces said Thursday that it's responsible for Israel's security and said they failed on Saturday.

The IDF said they'll investigate how the security failure happened, but right now, they're in a time of war.

Fabrizio Carboni, regional director for Near and Middle East for the International Committee of the Red Cross, said hospitals are losing power as Gaza loses power, risking the lives of the elderly on oxygen and newborns in incubators.

"Kidney dialysis stops, and X-rays can’t be taken," Carboni said. "Without electricity, hospitals risk turning into morgues."

Defense Secretary Lloyd Austin told reporters in Brussels Thursday that the U.S. is not placing conditions on its military aid to Israel.

Austin said Israel is "a professional military led by professional leadership" and "we would hope and expect that they would do the right things in the prosecution of their campaign."

Austin said U.S. intelligence had no indication or warning that Hamas was planning such an attack.

Echoing other administration officials, Austin said, "We've not seen any indication that Iran was involved in the planning or the execution of this attack," though he added the U.S. will continue to focus on whether that is truly the case.

Austin said that the U.S. will "work urgently to get Israel what it needs to defend itself," including munitions and Iron Dome interceptors, and said helping Israel won’t affect the U.S. flow of military aid to Ukraine.

-ABC News' Luis Martinez

While on a bipartisan congressional delegation trip to Israel, Senate Majority Leader Chuck Schumer and other members of the delegation were rushed into a bomb shelter in Tel Aviv to wait out a rocket attack, according to a social media post from Schumer.

"It shows you what Israelis have to go through," Schumer said in his post on X, which included a photo showing him and Republican Sen. Mitt Romney, a Romney staff and several others huddled in the small bomb shelter.