As Iran retaliates, largest US military base in Middle East hit by ballistic missile, Qatar says

President Donald Trump submitted to Congress on Monday a war powers notification regarding military action taken on Feb. 28 against the government of Iran.

“Despite my Administration’s repeated efforts to achieve a diplomatic solution to Iran’s malign behavior, the threat to the United States and its allies and partners became untenable,” Trump wrote in a letter addressed to Sen. Chuck Grassley, president pro tempore of the Senate.

“Accordingly, and at my direction, on February 28, 2026, United States forces conducted precision strikes against numerous targets within Iran including ballistic missile sites, maritime mining capabilities, air defenses and command and control capabilities. Strikes were undertaken to protect United States forces in the region, protect the United States homeland, advance vital United States national interests including ensuring the free flow of maritime commerce through the Strait of Hormuz and in the collective self-defense of our allies, including Israel," Trump wrote.

In the notification, Trump acknowledges that “it is not possible at this time to know the full scope and duration of military operations that may be necessary” during this conflict.

“United States forces remain postured to take further action, as necessary and appropriate to address further threats and attacks upon the United States or its allies and partners,” Trump wrote.

-ABC News' Isabella Murray

The U.S. embassy in Riyadh, Saudi Arabia, has been struck by two Iranian drones, according to two U.S. officials and initial estimates from the Saudi Ministry of Defense.

The strikes resulted in "limited fire and minor damage to the building," a spokesperson for the Saudi Ministry of Defense said.

The embassy was relatively empty given the overnight hours and no one is believed to have been injured -- but there is still believed to be an ongoing threat to the embassy, the U.S. officials said.

The Defense Ministry later said eight other drones were intercepted during the overnight hours.

The State Department also issued an alert advising Americans in Saudi Arabia to shelter in place immediately.

This is the second U.S. embassy to sustain damage in an Iranian drone strike, following Kuwait on Monday.

-ABC News' Shannon K. Kingston

After alerts were activated across Israel early Tuesday local time, the Israel Defense Forces said "launches from Iran have been identified toward several areas in the country's territory."

The United Arab Emirates' Ministry of Defense said in a recent statement that its "air defenses are currently dealing with a barrage of ballistic missiles coming from Iran."

The Qatari Ministry of Defense said it "successfully continued to intercept and neutralize two ballistic missiles that targeted several areas within the country."

In Kuwait, "armed forces are currently dealing with a wave of missiles and drones that have been detected in the airspace," army officials said.

Emergency sirens have also gone off in Bahrain, according to the country's interior ministry. "Citizens and residents are urged to remain calm and head to the nearest safe place," the ministry said.

Iranian Foreign Minister Abbas Araghchi said he believes American bases are "legitimate targets" in a new interview with Iranian state TV.

"When the United States attacks us -- whether by fighter jets or the ships it deploys -- they have access to our territory to strike with all kinds of missiles and aircraft. We cannot reach their territory, but we can reach their bases. I think those bases are legitimate targets," Araghchi said.