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.
'Small number' of Iranian missiles land in Israel: IDF
A "small number" of Iran's surface-to-surface missiles landed in Israeli territory early Sunday morning, Israel Defense Forces Spokesman Daniel Hagari said.
One missile hit an IDF base in the south and a female child was injured.
Hagari said the Israeli Air Force has intercepted more than 10 cruise missiles outside of the country's territory. Over 200 missiles and UAVs (drones) were launched from Iran, he said.
The IAF remains in the air.
Additionally, a U.S. defense official confirms Iran has fired both cruise and ballistic missiles
Britain launches Royal Air Force aircraft to intercept attacks on Israel
Britain's Defense Minister Grant Shapps said early Sunday morning local time that the U.K. is deploying "additional Royal Air Force" aircraft following Iran's attack on Israel.
"I have authorised the deployment of additional Royal Air Force assets. The RAF jets and air refuelling tankers will bolster our existing Operation Shader – the UK’s existing counter-Daesh operation in Iraq and Syria," Shapps' statement read. "In addition, these jets will intercept any airborne attacks within range of our existing missions, as required."
Following the news of the RAF deployment, U.K. Prime Minister Rishi Sunak said in a statement he "condemns in the strongest terms" Iran's attack on Israel.
"Iran has once again demonstrated that it is intent on sowing chaos in its own backyard," his statement read. "The UK will continue to stand up for Israel’s security and that all of our regional partners, including Jordan and Iraq.
"Alongside our allies, we are urgently working to stabilize the situation and prevent further escalation. No one wants to see more bloodshed."
-ABC News' Luis Martinez
Child in 'critical condition' in Bedouin area following Iranian strike: MDA
A 10-year-old child is in "critical condition," Israel's national emergency services -- the Magen David Adom -- has said.
EMTs and paramedics are currently treating the child in the Bedouin area, the MDA said.
-ABC News' Will Gretsky
Iran launches 70 additional missiles toward Israel: US official
A senior U.S. official tells ABC News that Iran has launched an additional 70 missiles.
The country had earlier launched 80, bringing the total to 150.
-ABC News' Martha Raddatz
US effort to build humanitarian pier off Gaza expected to top $180M
President Joe Biden's plan to use the military to build a giant pier off the coast of Gaza to deliver food, water and medicine will cost at least $180 million and could top $200 million, ABC News has learned.
The price tag was described by two people familiar with the initial estimate, which has not been released by U.S. Central Command.
The price tag is expected to fluctuate as U.S. officials scramble to finalize key details on the project, including which humanitarian organizations and foreign governments are willing to help carry the shipments to shore and distribute them.
The floating dock is expected to be nearly the size of a football field -- about 97 feet wide and 270 feet long -- stationed about 3 miles offshore. Container ships would screen their cargo in Cyprus before taking it to the floating dock and unloading it. From there, the aid would be moved aboard small Army ferries that would transport it to an 1,800-foot "trident" pier that connects to shore.
Officials also continue to discuss how to protect the service members who will be 3 miles offshore, where Hamas is believed to still operate.
The project -- which triggered the deployment of six Army and Navy ships and will involve some 1,000 U.S. military troops -- is on track to become operational in early May, enabling the delivery of some 2 million meals per day.
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-ABC News’ Anne Flaherty and Luis Martinez