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.
US helped 'take down nearly all' incoming drones, missiles: Biden
The U.S. helped "Israel take down nearly all of the incoming drones and missiles," President Joe Biden said in a statement late Saturday evening.
The president also detailed his call with Israeli Prime Minister Benjamin Netanyahu following the attacks, where Biden said he reaffirmed America's "ironclad commitment to the security of Israel." He also said that his team would stay in "close touch" with Israel's leaders.
Biden said his team will engage with the G7 leaders on Sunday to coordinate a "united diplomatic response to Iran’s brazen attack."
He noted that though American forces were not impacted, forces will continue to monitor and "will not hesitate to take all necessary action to protect our people."
-ABC News' Michelle Stoddart
31 people treated for stress, minor injuries going to shelters: Israeli police
According to Israeli police, Magen David Adom EMTs and paramedics were dispatched to 31 casualties in mild condition with anxiety symptoms or injuries caused while seeking shelter.
-ABC News' Will Gretsky
Congress shows bipartisan support for Israel
Congressional members from both sides of the aisle are out in full force expressing their full support for Israel and its right to defend itself from strikes by Iran.
Republicans are also calling on President Joe Biden to do more to assist Israel and to get tougher on Iran.
Senate Republican Leader Mitch McConnell, in a particularly strongly-worded statement, called on the administration to "lead an international effort to impose sufficient costs on Tehran to compel an end to its aggression and terror, both on Israeli soil and -- as demonstrated with today’s IRGC assault on a commercial shipping vessel -- around the region."
Congress has not yet approved additional aid to Israel specific to the escalating conflict in the region since Hamas' Oct. 7 attack.
The Senate approved billions in aid for Israel as part of its national defense supplemental, including aid for Ukraine. The House has not taken it up, and House Speaker Mike Johnson has instead said he's working on crafting yet-to-be-announced modifications to that package.
In a statement Saturday night, House Majority Leader Steve Scalise said the House will "move from its previously announced legislative schedule next week to instead consider legislation that supports our ally Israel and holds Iran and its terrorist proxies accountable."
-ABC News' Allison Pecorin and John Parkinson
Biden and Netanyahu to speak this evening
A senior administration official confirmed to ABC News President Biden and Israel's Prime Minister Benjamin Netanyahu are planning to speak Saturday evening.
President Biden is currently back in the Situation Room in a follow-up meeting with his national security team. The first meeting they had this afternoon in lasted for approximately two hours.
The official said they could reconvene the meetings again later tonight.
-ABC News' Selina Wang
'Majority' of intel came from coalition partners ahead of attack: Israeli Air Force official
A senior Israeli Air Force official said that the normalization of relations with Middle Eastern countries "served us during this crucial time" this weekend.
"It has to be clear that real assets" provided Israel with "information" and an "early warning," and the "majority" of that intelligence came from the coalition, the senior Israeli Air Force official said at a Monday briefing.
In terms of the types of drones and missiles used by Iran in the Saturday night attack, the official said Israel did not face any types of missiles that it had not shot down during attacks in recent months by Iranian proxies.
The official confirmed that only "a handful" of ballistic missiles fired by Iran were not intercepted.
"Five, more or less, managed to penetrate," the official said.
He said Israel's "strategic investment" in air defense capabilities, made years ago, had paid off, and called Israel shooting down nearly all missiles a "historic success."
The official was asked if Israel would be able to withstand a similar level of attack from Iran, without the support of allies such as the U.S.
"It would be more challenging,” the official conceded, but added that Israel has capabilities "to face this kind of challenge."
-ABC News’ Tom Soufi Burridge