Trump told reporters that he is talking to countries about policing the Strait.
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 in Tehran on the first day of strikes. His son Mojtaba Khamenei was chosen on Sunday to succeed him.
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.)
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At least 634 people have been killed and 1,586 wounded in Lebanon as Israeli strikes continue, according to the Lebanese Ministry of Health.
At least 700,000 people are now internally displaced within Lebanon as Israel says it is targeting Hezbollah infrastructure and leadership, according to the United Nations.
Top Iranian Revolutionary Guard Corps commander Ali Fadavi said Wednesday that Iran will not use any missile warhead lighter than 1 ton.
Fadavi claimed that President Donald Trump himself has been pursuing a ceasefire for two nights, he said in an interview on Iranian state TV.
Iran's IRGC aerospace commander Gen. Majid Moosavi had also put forward the claim on one-ton warhead missiles on Monday.
"From now on, no missile with a warhead lighter than one ton will be fired," Mousavi wrote in a post on his X account. "The wavelength of the firings and the wave levels will become longer, and the amplitude of them will become wider," he added.
If Iran's ports are threatened then it will consider "all ports and docks in the region will be our legitimate targets," a spokesperson for Iran's armed forces said Wednesday.
In an interview with the Iranian state TV, Gen. Abolfazl Shekarchi denied claims that the country's navy forces are hiding in economic ports. He threatened of heavier operations if Iran's ports are targeted.
Iran's attacks will continue in the coming days until the U.S. bases in the region are left "defenseless," Gen. Mohammad Akraminia, a spokesman for the Islamic Republic army, said Wednesday.
"The enemy has become incapable of intercepting our missiles and drones, and this process will continue in the coming days until the entire occupied territories and American bases in the region are left defenseless," he said, according to Islamic Republic News Agency.
-ABC News' Maryam Moqaddam and Somayeh Malekian
In light of reports that say the U.S. Department of Defense’s preliminary findings have determined the U.S. is responsible for the strike on the Iranian girls’ school that local officials say killed 168 people, President Donald Trump denied knowledge of such findings.
"I don't know about it," the president said to reporters Wednesday, when asked about the reports, as he departed the White House. Right before the president answered, press secretary Karoline Leavitt -- who was standing next to him -- shook her head and appeared to whisper, "no."
Trump also did not acknowledge a question as to whether he’d take responsibility as commander-in-chief.
Earlier Wednesday, the White House did not comment on the report’s alleged findings, insisting that the investigation remains ongoing and that there are "no conclusions" at this time.
-ABC News' Emily Chang, Fritz Farrow, Michelle Stoddart, Justin Fishel and Selina Wang
