Israel-Gaza updates: Poliovirus detected in wastewater across Gaza, WHO says

Yuval Green, a 26-year-old reservist who was called up to fight in southern Gaza, told ABC News he decided to leave the Israel Defense Forces when his unit was asked to set fire to a Palestinian house there.

Green served as a combat medic in Khan Younis, Gaza, last November and December.

"They gave us an order to burn down a house, and I went to my commander and asked him, 'Why are we doing that?'" Green said. "And the answers he gave me were just not satisfying enough, were not even close to being satisfying enough. And I said, 'I'm not willing to participate in that. If we're doing that, I'm leaving.'"

In June, Green cosigned a letter with 40 other reservists, who remained anonymous, refusing to serve in the southern Gaza city of Rafah.

The IDF told ABC News that its "actions are based on military necessity and in accordance to international law" and there was "no IDF doctrine that aims at causing maximal damage to civilian infrastructure regardless of military necessity."

Exceptional incidents were investigated by an independent body, the IDF said.

-ABC News' Guy Davies and Britt Clennett

President Joe Biden's focus next week in his meeting with Israeli Prime Minister Benjamin Netanyahu will be on nailing down the specifics of a ceasefire that could bring the hostages home, White House national security adviser Jake Sullivan said Friday.

"The overriding focus of the meeting between President Biden and Prime Minister Netanyahu is going to be about the cease-fire and hostage deal," he said at the Aspen Security Forum in Colorado.

Netanyahu will meet with Biden in Washington, D.C., on July 22.

"We are mindful that there remain obstacles in the way, and let's use next week to try to clear through those obstacles and get to a deal," Sullivan added.

The details that will be discussed between Biden and Netanyahu include Israel’s military presence in Gaza after a cease-fire, access to humanitarian aid, the "long-term disposition" of Gaza and how to execute the remaining hostage and prisoner swap as part of phase two.

-ABC News' Anne Flaherty

The top U.N. court said Friday that Israel's presence in the Palestinian occupied territories is "unlawful" and should end.

The International Court of Justice said several policies, including the building and expansion of Israeli settlements in the West Bank and east Jerusalem, the use of the area's natural resources, the annexation and imposition of permanent control over lands and discriminatory policies against Palestinians, violated international law.

The 15-judge panel said Israel's "abuse of its status as the occupying power" renders its "presence in the occupied Palestinian territory unlawful." It says its continued presence was "illegal" and should be ended as "rapidly as possible."

Israeli Prime Minister Benjamin Netanyahu dismissed the court's ruling in a statement.

"The Jewish people are not occupiers in their own land, including in our eternal capital Jerusalem nor in Judea and Samaria, our historical homeland. No absurd opinion in The Hague can deny this historical truth or the legal right of Israelis to live in their own communities in our ancestral home," he said.

-ABC News' Morgan Windsor, Bruno Nota and Dana Savir

A man in Tel Aviv has died after being injured in an explosion resulting from what authorities believe was an unmanned aerial vehicle (UAV).

"During searches of the scene, an unconscious man was found in one of the buildings, with penetrating injuries," Zachi Heller, a spokesperson for Israel's emergency medical service Magen David Adom (MDA), confirmed to ABC News.

The man, who Heller said was 50, did not exhibit signs of life and it was determined he had died.

Information is still developing, but the Israel Defense Forces said early Friday morning that the person who died was hit by a fragment of the UAV.

IDF Chief spokesperson Rear Admiral Daniel Hagari said the military assessed that the drone was an upgraded Iranian-made Samad-3 model.

"Our estimation is that it arrived from Yemen to Tel Aviv," he told a briefing with journalists.

Four people were treated for shrapnel injuries at the scene and four were treated by EMS for shock/anxiety. All eight were taken to the Wolfson and Ichilov hospitals, Heller said.

-ABC News' Will Gretsky