Israel-Gaza-Lebanon live updates: Situation in North Gaza is 'apocalyptic,' WHO says

Israeli lawmakers are set to discuss two bills intended to end all Israeli cooperation with UNRWA -- the United Nations agency that provides assistance to Palestinian refugees.

If the bills pass, UNRWA could be evicted from premises it has held for over 70 years and have its immunities revoked, majorly restricting its ability to deliver health care, education and other resources to Palestinians.

An Oct. 13 letter from Secretary of State Antony Blinken and Defense Secretary Lloyd Austin to Israeli ministers warned that the proposed UNRWA legislation could exacerbate the humanitarian crisis in Gaza and restrict aid to Palestinians in the West Bank and Jerusalem.

Israel alleges that UNRWA is compromised by militants, with Israeli intelligence claiming that around 10% of UNRWA's Gaza workforce -- some 1,200 employees -- are Hamas and Palestinian Islamic Jihad operatives.

-ABC News' Jordana Miller and Joe Simonetti

The Israel Defense Forces said Monday it completed its raid on the Kamal Adwan Hospital in Beit Lahia, in the northern Gaza Strip where IDF troops have been waging a major campaign.

The IDF claimed that "a number of terrorists -- including Hamas terrorists who took part in the Oct. 7 massacre -- had barricaded themselves inside the hospital."

The IDF said its troops arrested around 100 fighters from within the hospital compound, "including terrorists who attempted to escape during the evacuation of civilians."

The IDF said it found "weapons, terror funds and intelligence documents" in the hospital and in the surrounding area.

-ABC News' Jordana Miller

Iranian President Masoud Pezeshkian said on Sunday his country would stand firm following Israel's attack on Iran.

"Definitely the free people will not back off in the face of this criminal, blood-thirsty regime. We have always defended the rights of our people and will continue to do so," Pezeshkian told cabinet members, according to The Associated Press.

Earlier, Iranian state TV reported that Pezeshkian said Iran would respond to Israel "appropriately.”

Israel attacked military targets in Iran on Saturday in retaliation for the barrage of ballistic missiles Iran fired on Israel earlier this month, marking the first time the IDF has openly attacked Iran.

Pezeshkian also warned tensions will escalate if Israel’s aggressions and crimes continue.

-ABC News' Ellie Kaufman

The U.N. Security Council will meet Monday at Iran's request after Israel’s retaliatory attack against the country, a spokesperson for the Israeli Ambassador to the U.N. confirmed to ABC News.

The Iranian Ministry of Foreign Affairs called Israel’s retaliatory attack a "serious violation of the sovereignty and territorial integrity of the Islamic Republic of Iran and a flagrant breach of international law," in a letter requesting the U.N. Security Council meeting.

The letter from Iran's Ministry of Foreign Affairs was sent to the UNSC’s current president and U.N. Secretary General António Guterres.

-ABC News' Ellie Kaufman