No one was injured, according to the Qatari Ministry of Defense.
President Donald Trump announced "major combat operations" against Iran on Saturday, with daytime strikes in the joint U.S.-Israel attack targeting military and government sites, officials said.
On Sunday, Iranian state television confirmed that Ayatollah Ali Khamenei was among those killed by airstrikes in Tehran on Saturday.
Iran is responding to the U.S.-Israeli operation with missile and drone attacks targeting Israel, regional U.S. bases and Gulf nations. American diplomatic facilities have also been attacked.
In Lebanon, Israel is intensifying its long-running strike campaign against the Iranian-aligned Hezbollah militia.
Watch special coverage on Nightline, "War with Iran," each night on ABC and streaming on Disney+ and Hulu.
Defense Secretary Pete Hegseth and Gen. Dan Caine, the chairman of the Joint Chiefs of Staff, are scheduled to hold a press conference at the Pentagon at 8 a.m. ET on Monday to provide details about the campaign against Iran.
The briefing will be the first of any kind by the administration since the start of what the Pentagon is calling "Operation Epic Fury" on Saturday.
-ABC News’ Luis Martinez
The Israel Defense Forces on Monday claimed to have killed several senior Iranian intelligence officials in its opening wave of strikes on Iran on Saturday.
The IDF named Syed Yahya Hamidi -- who it said was the deputy minister of intelligence for Israel affairs -- and Jalal F'or Hussein -- who it named as the head of the Intelligence Ministry’s espionage division.
The IDF said it also killed “a number of other senior officials” alongside Hamidi and Hussein.
Saudi Arabia’s Ministry of Defense said that two drones targeting the Ras Tanura refinery were intercepted and destroyed.
"The interception operation caused shrapnel to fall near civilian facilities and civilians," the ministry said on social media, adding that "limited fire caused by falling shrapnel during the interception operation, with no civilian injuries."
The refinery, which is run by Saudi Aramco, is in the Eastern Province and is among the country's largest.
-ABC News’ Somayeh Malekian and Ghazi Balkiz
The Israeli military carried out a "precise targeted" strike in Beirut, Lebanon, on Monday, an Israel Defense Forces spokesperson said.
The strike was "against a prominent Hezbollah terrorist element," Avichay Adraee, the spokesperson, said in a social media post.
