Israel-Gaza updates: Police killed in border shooting, authorities say

There are two areas of dispute regarding hostage release and cease-fire negotiations -- the prisoner exchange and withdrawal of Israeli troops from the Philadelphi corridor -- according to a U.S. senior administration official.

The official told reporters Wednesday that "90% of this deal has been agreed to," while also pushing back on the suggestion that the Philadelphi corridor is the only remaining sticking point, noting that the prisoner exchange was the focus for most of last week's discussions.

The official called the negotiations with Hamas on the prisoner exchange "pretty frustrating," and said that "until that is worked out, you're not going to have a deal."

The official noted that negotiations have been taking place off a list of hostages -- a list that is now smaller after the killing of six hostages over the weekend.

"You know, it's horrific. And Hamas is threatening to execute more hostages," the official said. "We all know who we're dealing with. We're dealing with a terrorist group."

"For each hostage, there's a certain number of Palestinian prisoners that will come out. So, you just have fewer hostages as part of the deal in phase one. It's tragic and awful, and you know, it's affecting all of us," the official added.

-ABC News' Molly Nagle and MaryAlice Parks

Approximately 95 projectiles were launched toward northern Israel from Lebanon on Wednesday, according to the Israel Defense Forces.

There were several fires from the projectile launches in northern Israel, but no injuries were reported, the IDF said.

Hezbollah confirmed in several statements various attacks on northern Israel on Wednesday.

Israeli forces struck targets in southern Lebanon in response, the IDF said.

-ABC News' Jordana Miller and Ghazi Balkiz

Israeli Prime Minister Benjamin Netanyahu doubled down on his position that Israeli forces cannot leave the Philadelphi corridor and still achieve Israel's goals of the war in Gaza during a press conference in Jerusalem Wednesday.

"I'm telling you that if we relieve the pressure, if we get out of the Philadelphi corridor, we are not going to get the hostages back," Netanyahu said.

The Philadelphi corridor -- a narrow strip of land on the Gaza side of the Gaza-Egypt border -- has been one of the main sticking points in reaching a hostage and cease-fire deal.

Netanyahu said Wednesday that Israel needs to control the corridor to release the remaining hostages in Gaza.

"I'm committed to returning the remaining 101 [hostages]. I'll do everything to get them, but leaving Philadelphi does not advance the release of the hostages, because the deal cannot be advanced," he said.

-ABC News' Ellie Kaufman

Around 65 projectiles were fired into Israel from Lebanon on Wednesday, the Israel Defense Forces said, with air raid sirens sounding and air defense units active in border areas.

"The IDF Aerial Defense Array successfully intercepted some of the projectiles, and some fell in open areas," the force said.

"A number of fires were ignited by fallen projectiles," it added, noting that emergency services were responding.

The IDF said it was "currently striking Hezbollah terror targets in southern Lebanon."

-ABC News' Jordana Miller and David Brennan