U.S. forces struck 90 Iranian military targets overnight, Central Command said.
President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israeli strikes targeting military, government and infrastructure sites.
Delegations from the U.S. and Iran entered negotiations last month aimed at a war-ending deal based on a memorandum of understanding signed by both countries.
The U.S. and Iran nonetheless exchanged limited strikes in late June despite the signing of the memorandum and amid the continuation of peace talks.
The head of Iran's railway company said Thursday that one of Mashhad railway lines that was damaged in the overnight U.S. strikes has already been reconstructed "in less than 15 hours" after it was hit, and train traffic has resumed on the line.
According to Iranian state TV, the head of the railway company added that the second damaged line will be reconstructed within the next few hours.
Israeli Prime Minister Benajmin Netanyhau said the country will remain in southern Lebanon for "as long as necessary to ensure the security of our communities in the north."
"If we had not acted at the time we did, and with the intensity with which we did – Iran would have armed itself with nuclear weapons to destroy Israel, that is their plan, and the citizens of Israel would have been in danger of mass death," Netanyahu said while speaking at a pilots' graduation ceremony on Thursday.
"That is why we embarked on these operations with our American friends – to ward off the threat of immediate annihilation, and also a great danger to the entire Western world," Netanyahu said.
Fourteen people were killed in attacks on Iran on Wednesday and Thursday, Hossein Kermanpour, head of public relations at Iran's Health Ministry, wrote in a post on X.
Another 78 people were injured in the attacks, of whom 47 remain hospitalized, Kermanpour said.
A ship fleet company executive who has a ship waiting to cross the Strait told ABC News the company doesn't "feel secure" moving ships amid the uncertainty around the Strait of Hormuz.
"The situation is very sensitive right now," the executive said.
The executive said the company used the shipping route approved by U.S. Central Command, which Iran said it is opposed to.
"With the U.S. cover we are more certain so we take the Omani route that hugs the coast," the executive said.
But, several ships using that route have now been struck with Iran pushing for ships to use its route.
"It's more uncertain now and we don't know if we should take the [U.S. route or the] other route. We don't feel secure enough for it," the executive said.
"Especially today, at this moment we are asking -- do we have a ceasefire or not,? its very tough to go via the Iranian route and registering with them, so far we are working with the Omanis to take that route," the executive said Thursday.
"Its a day by day situation. We aren't working in a vacuum; we speak with U.S. naval forces and security agencies that are giving us guidance, we make a call based on that," the executive said.
-ABC News' Desiree Adib
