Iran live updates: US blockade of Iran's Strait of Hormuz ports to begin Monday

President Donald Trump issued a broad threat against Iran on Tuesday morning, as his Tuesday evening deadline for Tehran to fully re-opening of the Strait of Hormuz loomed.

Trump issued a stark threat Tuesday, about 12 hours ahead of his deadline for Iran to agree to a deal that includes reopening the Strait of Hormuz or face punishing strikes.

"A whole civilization will die tonight never to be brought back again. I don't want that to happen, but it probably will," Trump wrote on his social media platform.

"However, now that we have Complete and Total Regime Change, where different, smarter, and less radicalized minds prevail, maybe something revolutionarily wonderful can happen, WHO KNOWS?" Trump also wrote.

"We will find out tonight, one of the most important moments in the long and complex history of the World. 47 years of extortion, corruption, and death, will finally end. God Bless the Great People of Iran!" the president said.

The United States struck military targets on Kharg Island overnight, according to a U.S. official.

These strikes targeted some of the same military targets struck in the earlier strike in March, though the official stressed that these strikes did not target the island's oil infrastructure.

A synagogue in Tehran was "completely destroyed" in U.S.-Israeli strikes overnight, the official Islamic Republic News Agency reported on Tuesday.

Located in central Tehran, Rafi-Nia Synagogue served as a religious center for the city's Jewish community, the semi-official ISNA News Agency reported.

The attacks were condemned by Homayoun Sameh Najafabadi, the representative of the Jewish community in Iran's parliament, according to IRNA. He said that carrying out the strikes during the Passover holiday showed that Israel had an "anti-religious attitude."

"At the beginning of the attack on our country, Trump claimed that he was carrying out these strikes in support of the people. But later, most of those who were martyred, injured, or disabled by the United States and Israel were these same people," Najafabadi said.

Iran's Deputy Minister of Sports and Youth Alireza Rahimi invited people to form human chains around the country's power plants in a video message published on Monday, according to the government's Telegram channel.

Rahimi called on young people, artists, athletes, students and professors to join the initiative -- which he described as a "symbolic move" -- on Tuesday at 2 p.m. local time (6:30 a.m. ET), regardless of their political views, to protect infrastructure he referred to as "national assets that belong to the future of Iran and its young people."

The invitation came as President Donald Trump's Tuesday evening deadline for Iran to fully re-open the Strait of Hormuz approached. Trump has threatened to destroy Iranian civilian infrastructure -- including power plants and bridges -- if Tehran does not comply.

Israeli attacks on Iranian infrastructure, meanwhile, have intensified across the country.