He is the son of assassinated Supreme Leader Ayatollah Ali Khamenei.
President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israel strikes attack targeting military and government sites, officials said.
Iranian state television confirmed that Ayatollah Ali Khamenei was among those killed by airstrikes in Tehran on the first day of strikes. His successor is yet to be named.
Iran is responding to the operation with missile and drone attacks targeting Israel, regional U.S. bases and multiple Gulf nations. Israel is also intensifying its long-running strike campaign against the Iran-backed Hezbollah militia in Lebanon.
(Read previous Iran live updates here.)
Watch special coverage on Nightline, "War with Iran," each night on ABC and streaming on Disney+ and Hulu.
At least 77 people have been killed and 527 others have been wounded by Israeli attacks in Lebanon since dawn on Monday, the Lebanese Ministry of Public Health said Thursday.
-ABC News' Ghazi Balkiz and Morgan Winsor
Authorities in Abu Dhabi, the capital of the United Arab Emirates, said on Thursday that six foreign nationals were injured by falling debris after the "successful interception of drones by air defence systems."
Debris fell in two locations in the ICAD 2 area to the south of Abu Dhabi city. "The incident resulted in minor and moderate injuries to six Pakistani and Nepali nationals," the Abu Dhabi Media Office said.
-ABC News Zoe Magee and Morgan Winsor
The Israel Defense Forces on Thursday published a video of what it said was the shooting down of an Iranian Yak-130 fighter jet over Tehran on Wednesday.
An Israeli F-35 "Adir" fighter jet was responsible, the IDF said.
-ABC News' Morgan Winsor
Azerbaijan's Foreign Ministry said on Thursday that drones attacked the city of Nakhchivan, just north of the country's border with Iran.
One drone hit the city's airport, injuring two civilians, the ministry said. A second drone hit a school building in a nearby village, it added.
"We strongly condemn these drone attacks launched from the territory of the Islamic Republic of Iran," the ministry said, and demanded a "clear explanation."
-ABC News' Victoria Beaule
