Israel-Gaza updates: 22, including 18 children, reported dead in Rafah strikes
The IDF says it struck military targets of terrorist organizations in Gaza.
Israel launched a retaliatory strike against Iran early Friday morning local time, a senior U.S. official told ABC News.
The strike followed Iran's attack on Saturday, when Tehran sent a volley of more than 300 drones and missiles toward targets in Israel, according to Israeli military officials. All but a few were intercepted by Israel and its allies, including the United States, officials said.
Iran's weekend attack came more than six months after Hamas terrorists invaded Israel on Oct. 7, after which the Israeli military began its bombardment of Gaza.
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What to know about Iran's attack on Israel
Israeli officials said the country's Iron Dome defense system endured a big test from Iran's attack on Saturday, intercepting 99% of the 300 "threats of various types" thrown at it.
Iran's Islamic Revolutionary Guard Corps, according to Israel Defense Forces spokesperson Daniel Hagari, launched 170 unmanned aerial vehicles (UAVs), more than 120 ballistic missiles and more than 30 cruise missiles in the attack.
Hagari said "99% of the threats launched towards Israeli territory were intercepted -- a very significant strategic achievement."
Hagari said the attack resulted in only one known Israeli casualty, a 7-year-old girl who was severely injured when she was struck by shrapnel apparently from an intercepted missile.
Israel says IDF killed head of Hamas' Emergency Bureau
The Israel Defense Forces said its fighter jets struck and killed Hatem Alramery, the head of Hamas' Emergency Bureau, in Gaza on Monday night.
Hamas said civilians were also killed in the strike.
Hamas says Israel is being 'stubborn' in negotiations
Hamas officials are accusing the Israelis of being "stubborn" during the latest round of negotiations in Cairo.
"Despite this," Hamas officials said in a statement, Hamas leaders are "studying the submitted proposal … and will inform the mediators of its response once this is completed."
CIA Director Bill Burns presented a new hostage/cease-fire proposal in Cairo this weekend, which included an initial release of 40 hostages in exchange for six-week cease-fire, a source familiar with the negotiations told ABC News.
CIA director presented new hostage-release deal: Source
A source tells ABC News that CIA Director William J. Burns presented a new hostage-release/cease-fire proposal in Cairo last weekend to help broker a deal between Israel and Hamas.
The source confirmed the proposal included an initial release of 40 hostages in exchange for a six-week cease-fire.
Officially, the CIA did not provide a comment.
-ABC News’ Cindy Smith and Ellie Kaufman
Highest number of aid trucks enter Gaza since start of war
A total of 419 humanitarian aid trucks entered Gaza on Monday, marking the highest number of aid trucks to enter Gaza in one day since the start of the war, according to Israeli aid agency COGAT.
This beats the record that was set one day earlier, when 322 trucks entered Gaza.
US to Israel: If you strike back at Iran, you'll do it alone
As Israel on Monday weighed its response to Iran’s weekend attack, the U.S. is privately telling officials there: If Israel strikes back militarily, it will do so alone.
It's an unusual message for a close ally that's spent decades receiving more U.S. military aid than any other country in the world and whose relationship with America is often described as "ironclad."
But after months of Israel acting on its own in Gaza -- and facing tough criticism from the U.S. and other allies that its military operations have gone too far – the Biden administration made clear the U.S. wouldn't participate in offensive military operations against Iran, fearing a broader war in the Middle East.
"We believe Israel has freedom of action to protect itself and defend itself," a senior administration official told reporters shortly after Iran's attack ended. "That's a long-standing policy, and that remains."
When asked by a reporter if the U.S. would help Israel counter with offensive military operations, the official said no.
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-ABC News’ Anne Flaherty