TEHRAN, Iran (AP) — U.S. President Donald Trump threatened Tuesday that a “whole civilization will die tonight” if Iran fails to meet his latest deadline to strike a deal that includes reopening the Strait of Hormuz, while the Islamic Republic urged young people to form human chains around power plants and other potential targets.

Trump’s expansive threat did not seem to account for potential harm to civilians, prompting Democrats in Congress, some United Nations officials and scholars in military law to say such strikes would violate international law.

Tehran’s representative at the U.N said the threats “constitute incitement to war crimes and potentially genocide.” Amir-Saeid Iravani said Iran would “take immediate and proportionate reciprocal measures” if Trump launches devastating strikes.

Even before the deadline, airstrikes hit two bridges and a train station, and the U.S. hit military infrastructure on Kharg Island. It was the second time American forces struck the island, a key hub for Iranian oil production.

Trump has extended

deadlines before

Since the war began, Trump has repeatedly imposed deadlines linked to threats, only to extend them. But the president insisted this one is final and would expire at 8 p.m., Tuesday night, April 8, in Washington without a major diplomatic breakthrough.

He has also offered contradictory statements about what might actually happen.

Trump has made reopening the strait — through which a fifth of the world’s oil transits in peacetime — part of avoiding wider attacks and suggested that the waterway is not as vital to U.S. oil interests as it is to other countries. He has also said he would be willing to deploy ground troops to seize Iranian oil, while maintaining that major combat operations in that country could soon conclude.

That means the next moves by the U.S. are largely a mystery, even as rhetoric on both sides has reached a fever pitch.

Meanwhile, Iran’s president said 14 million people, including himself, have volunteered to fight. That’s despite Trump threatening that U.S. forces could wipe out all bridges in Iran in a matter of hours and reduce all power plants to smoking rubble in roughly the same time frame. He also suggested the entire country could be wiped off the map.

New strikes may not have been linked to Trump’s

larger threats

It was not clear if the latest airstrikes were linked to Trump’s threats to widen the civilian target list. At least two of the targets were connected to Iran’s rail network, and Israeli Prime Minister Benjamin Netanyahu said Israeli warplanes struck bridges and railways in Iran.

Tehran fired on Israel and Saudi Arabia, prompting the temporary closure of a major bridge.

While Iran cannot match the sophistication of U.S. and Israeli weaponry or their dominance in the air, its chokehold on the strait is roiling the world economy and raising the pressure on Trump both at home and abroad to find a way out of the standoff.

Officials involved in diplomatic efforts said talks were ongoing, but Iran has rejected the latest American proposal.

Trump has shrugged off concerns about war crime accusations

“A whole civilization will die tonight, never to be brought back again,” if a deal isn’t reached, Trump said in an online post Tuesday morning. But he also seemed to keep open the possibility of an off-ramp, saying that “maybe something revolutionarily wonderful can happen.”

Earlier, Iranian official Alireza Rahimi issued a video message calling on “all young people, athletes, artists, students and university students and their professors” to form human chains around power plants.

Iranians have formed human chains in the past around nuclear sites at times of heightened tensions with the West. State media posted videos online that showed hundreds of flag-waving people massed at two bridges and at a power plant hundreds of kilometers (miles) from Tehran, though it was not clear how widespread the practice was.

President Masoud Pezeshkian posted on X that 14 million Iranians had answered campaigns urging people to volunteer to fight — and said he would join them — while a Revolutionary Guard general urged parents to send their children to man checkpoints.

The Guard warned that Iran would “deprive the U.S. and its allies of the region’s oil and gas for years” and expand its attacks across the Gulf region if Trump carries out his threat.

In Tehran, the mood was bleak. A young teacher said that many opponents of Iran’s Islamic system had hoped Trump’s attacks would quickly topple it.

As the war drags on, she fears U.S. and Israeli strikes will spread chaos.

“If we don’t have the internet, and if we don’t have electricity, water, and gas, we’re really going back to the Stone Age, as Trump said,” she told The Associated Press, speaking on the condition of anonymity for her safety.

French Foreign Minister Jean-Noel Barrot joined a growing chorus of international voices saying that attacks targeting civilian and energy infrastructure could constitute a war crime.

Such cases are notoriously difficult to prosecute, though, and Trump says he’s “not at all” concerned about committing war crimes.

Volker Turk, the U.N. high commissioner for human rights, said he deplored the rhetoric being used over the last two weeks “by all parties, including the latest threats to annihilate a whole civilization and to target civilian infrastructure.”

Airstrikes hit Iran, which fires on Saudi Arabia

and Israel

Intense airstrikes pounded Tehran, including in residential neighborhoods. In the past, such strikes have targeted Iranian government and security officials.

The Israeli military said it attacked an Iranian petrochemical site in Shiraz, the second day in a row it hit such a facility. The military later said it also struck bridges in Tehran, Karaj, Tabriz, Kashan and Qom that were being used by Iranian forces to transport weapons and military equipment.

A U.S. official, who spoke on condition of anonymity to discuss sensitive military operations, described the strikes on Kharg Island as hitting targets previously struck and not directed at oil infrastructure.

Earlier in the war, American forces hit air defenses, a radar site, an airport and a hovercraft base there, according to satellite analysis by the Institute for the Study of War and the American Enterprise Institute’s Critical Threats Project.

Saudi Arabia said it intercepted seven ballistic missiles and four drones launched by Iran.