The bodies of four Israeli hostages recovered last week were found in a tunnel in Jabaliya in northern Gaza, the Israel Defense Forces said Monday.

The bodies of Shani Louk, Amit Buskila, Ron Benjamin and Yitzchak Gelernter -- who were killed during the Oct. 7 Hamas attack and taken into Gaza -- were recovered following a monthslong operation, the IDF said.

Israeli forces also "located intelligence materials and large quantities of weapons" during the night operation, the IDF said.

More than 810,000 people have fled Rafah in the past two weeks amid Israel's ongoing military operation in the southern Gaza city, according to the United Nations Relief and Works Agency for Palestine Refugees (UNRWA).

"Every time families are displaced their lives are at serious risk. People are forced to leave everything behind looking for safety. But, there's no safe zone," UNRWA said on X Monday.

Congress is considering sanctioning the International Criminal Court regarding the arrest warrants for Prime Minister Benjamin Netanyahu and Defense Minister Yoav Gallant, according to House Speaker Mike Johnson.

“In the absence of leadership from the White House, Congress is reviewing all options, including sanctions, to punish the ICC and ensure its leadership faces consequences if they proceed," Johnson said in a statement. "If the ICC is allowed to threaten Israeli leaders, ours could be next."

The ICC has "no authority" over Israel or the U.S., Johnson noted.

-ABC News' Lauren Peller

President Joe Biden called the application for arrest warrants from the International Criminal Court against Israeli Prime Minister Benjamin Netanyahu and other Israeli leaders "outrageous."

"And let me be clear: whatever this prosecutor might imply, there is no equivalence -- none -- between Israel and Hamas," Biden said.

"We will always stand with Israel against threats to its security," Biden's statement said.

The U.S. and Israel are not parties in the ICC.

After widespread condemnation, Israel has reversed course and returned equipment seized from The Associated Press. The equipment was seized and they took down their AP's live shot of northern Gaza from Israel Tuesday, citing a controversial new media law.

Israel had accused the AP of violating the new law by allowing Al Jazeera to access their live feed, according to the AP. Al Jazeera is one of the AP’s thousands of international clients.

"The Communications Ministry acted today to confiscate equipment that, despite repeated warnings, transmitted to Al-Gazira about the positions of our forces in the northern Gaza Strip while putting them at risk in accordance with security opinions and the government's decision," Israeli Minister of Communication Shlomo Karai said in a statement. "Since the Ministry of Defense wishes to examine the matter of the broadcasts from these locations in Sderot regarding the risk to our forces, I have now ordered to cancel the operation and return the equipment to the AP agency, until a different decision is made by the Ministry of Defense."

"The Associated Press decries in the strongest terms the actions of the Israeli government to shut down our longstanding live feed showing a view into Gaza and seize AP equipment," said Lauren Easton, vice president of corporate communications at the AP earlier Tuesday. "The shutdown was not based on the content of the feed but rather an abusive use by the Israeli government of the country’s new foreign broadcaster law. We urge the Israeli authorities to return our equipment and enable us to reinstate our live feed immediately so we can continue to provide this important visual journalism to thousands of media outlets around the world."

The AP refused a verbal order issued earlier to take down the transmission, and said it complies with Israeli military censorship rules.

In 2021, Israel destroyed the AP office inside Gaza, saying Hamas operated from the building, which the AP has denied. The office offered a live position from inside Gaza throughout many of the conflicts there.

-ABC News' Guy Davies