Israel-Gaza updates: Biden speaks with Netanyahu about hostages, Gaza aid

President Joe Biden told reporters aboard Air Force One that Egypt’s president has agreed to open the Rafah crossing gate to allow up to 20 trucks with aid to travel to Gaza.

He said there are potholes in the road that have to be fixed before the trucks can go through, so the aid may not get there until Friday.

"This has been a very blunt negotiation," Biden said.

The president said according to the agreement, if the aid trucks cross the border, the U.N. will be on the other side to distribute it. However, if Hamas confiscates the supplies, or if it doesn't get through "then it's going to end," Biden said.

The Rafah crossing was shut on Oct. 10 after it was hit by Israeli warplanes on the Palestinian side three times on Oct. 9 and 10.

Gaza has been under siege by Israeli forces for over a week and humanitarian groups, doctors and others on the ground have pleaded for more supplies.

-ABC News' Selina Wang

The United Kingdom issued an advisory to its citizens living in Lebanon to "leave now while commercial options remain available."

The advisory warned of ongoing mortar, artillery exchanges and airstrikes in the southern part of the country which borders Israel. It also stated there's "a risk of civil unrest."

"Events in Lebanon are fast moving. The situation has potential to deteriorate quickly and with no warning," the government said in the advisory.

The government warned that "the British Embassy may be increasingly limited in the assistance that it can provide," if things escalate.

-ABC News' Ellie Kaufman

The White House announced that President Joe Biden will "address the nation to discuss our response to Hamas’ terrorist attacks against Israel and Russia’s ongoing brutal war against Ukraine," in a televised address from the Oval Office at Thursday at 8 p.m. ET.

The chairman and vice chairman of the Senate Intelligence Committee said in a statement that, based on intelligence received by the committee, they believe Tuesday's blast at a Gaza hospital that killed hundreds was not the result of an Israeli airstrike.

“The Senate Intelligence Committee has received and reviewed intelligence related to the attack on al-Ahli hospital in Gaza. Based on this information, we feel confident that the explosion was the result of a failed rocket launch by militant terrorists and not the result of an Israeli airstrike," Sens. Mark Warner and Marco Rubio said in a joint statement Wednesday.

Earlier in the day, House Intelligence Committee Chair Mike Turner and Ranking Member Jim Himes drew similar conclusions.

"Based on information the House Intelligence Committee received from the Administration regarding the hospital attack in Gaza, we believe this was not the result of Israeli military action," Turner and Himes said.

The hospital blast killed at least 471 and injured another 314 people, according to the Palestinian Health Ministry.

Israel and Hamas have traded blame for the explosion with the Israeli military claiming it was a result of a "failed rocket launch by the Islamic Jihad terrorist organization," while Hamas has said it was the result of an Israeli airstrike. Two U.S. officials told ABC News the Pentagon independently concluded the blast was likely caused by an errant Palestinian Islamic Jihad rocket that fell short of its target.

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Fears of a bigger war grow after Gaza hospital strike

Protests erupted in Beirut overnight and the U.S. State Department is authorizing voluntary and temporary departure of government family members posted in the city.

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-ABC News' Allison Pecorin