The president demanded once again that Iran open the Strait of Hormuz and said that "all Hell will reign down" on the country if officials don't "make a deal."

As the US military's frantic search continued Saturday for an airman who was aboard an F-15E fighter jet when it was downed by Iranian forces a day earlier, and analysts and Iranian media alike suggested the Trump administration has lost control of its war against Iran, President Donald Trump issued his latest threat against the country—once again appearing to threaten tens of millions of Iranians with war crimes.

Renewing his demand that Iran "MAKE A DEAL or OPEN UP THE HORMUZ STRAIT," the president said he was giving the Iranian government "48 hours before all Hell will reign down on them," appearing to confuse the word "reign" with "rain."

"Time is running out," said Trump in a post on his social media platform, Truth Social.

In his post, Trump did not directly address the ongoing search for the airman, who was one of two who ejected from the fighter jet when Iran reportedly used new air defense systems to shoot down the plane. One crew member was found and rescued on Friday.

Iranian officials were also looking for the missing airman on Saturday, raising concerns that the service member could be taken as a hostage and used as leverage.

The president has said little about the ongoing search, but spoke briefly to The Independent in a phone call Saturday about the possibility that Iran could find the service member first.

"We hope that’s not going to happen,” he said.

Trump's comments on social media, meanwhile, appeared to signal "a countdown to massive war crimes," said New York University law professor Ryan Goodman.

The president has also previously warned Iran with an ultimatum, only to delay the threatened action. He said on March 22 that the US would

The March 22 threat was likely a reference to Bushehr Nuclear Power Plant, the vicinity of which was struck by a projectile on Saturday, prompting condemnation from the International Atomic Energy Agency. Human rights experts have repeated warnings in recent weeks that striking power plants would constitute war crimes.

At least five people were killed and 170 were injured in airstrikes on a petrochemical hub in Iran's Khuzestan province on Saturday morning, in addition to the Bushehr attack.

After his initial threat, Trump later said direct strikes on energy infrastructure would not be launched until April 6, and demanded that Iran open the key waterway before then.

Despite Trump's increasingly belligerent threats of "hell" and destruction of civilian infrastructure, a number of media critics noted on Saturday that mainstream Western news outlets including The New York Times, The Economist, and Bloomberg described Iran's use of air defense systems to shoot down US war planes involved in the invasion as an "escalation from Iran's leadership."

"Does Iran have a right to defend itself? Does Palestine? Does Lebanon?" asked commentator Hasan Piker, noting that the US and Israel have claimed they launched the invasion of Iran to "defend" themselves against an imminent attack, contrary to US intelligence analysis. "Or is it just Israel and America who get to claim self-defense as they engage in wars of conquest?"