The president threatened that the U.S. will “hit” Iran “with a force that has never been seen before!”

President Donald Trump issued a warning to Iran just after midnight as tensions in the Middle East threaten to spiral.

“Iran just stated that they are going to hit very hard today, harder than they have ever hit before,” Trump wrote on Truth Social. “THEY BETTER NOT DO THAT, HOWEVER, BECAUSE IF THEY DO, WE WILL HIT THEM WITH A FORCE THAT HAS NEVER BEEN SEEN BEFORE!”

The post, signed off “President DONALD J. TRUMP,” marked his most explicit threat yet of overwhelming retaliation.

Three United States service members have been killed in action, and five are “seriously wounded” in the war Trump launched overnight Saturday, according to a statement from U.S. Central Command.

“As of 9:30 am ET, March 1, three U.S. service members have been killed in action and five are seriously wounded as part of Operation Epic Fury,” a spokesperson wrote Sunday at 9:49 a.m.

The announcement came hours after Tehran signaled it would intensify its response to ongoing U.S. and Israeli strikes in retaliation for airstrikes that killed Ayatollah Ali Khamenei, Iran’s Supreme Leader.

The president shifted his focus back to the war he started after hosting a glitzy fundraiser at his sprawling Florida estate on Saturday night—even as Iranian missiles lit up the Middle East, targeting the U.S. and its allies in the region.

Meanwhile, Mohammad Bagher Ghalibaf, speaker of Iran’s parliament, lashed out Sunday, calling U.S. and Israeli leaders “filthy criminals” and vowing they would suffer “devastating blows” for crossing Iran’s “red line.”

In a televised address, he warned: “You have crossed our red line and must pay the price.”

In a statement posted to its official Telegram channel, Iran’s Revolutionary Guards vowed to launch the “most ferocious offensive operation in the history of the Islamic Republic of Iran’s armed forces” against Israel and U.S. bases, saying the operation would begin “any moment now.”

Ali Larijani, the secretary of the Supreme National Security Council of Iran, issued a stern warning to countries with U.S. military bases on X Sunday morning.

“To the countries of the region: We are not seeking to attack you,” he wrote Sunday morning in a post viewed over a million times at publication. “But when the bases located in your country are used against us, and when the United States carries out operations in the region relying on these forces, then we will target those bases.”

He continued: “For these bases are not part of the land of those countries; rather, they are American soil.”

Israel Emergency Services reported at least eight people were killed and 28—including children— were wounded in a “missile barrage” on Saturday and overnight in the country.

The United Arab Emirates Defense Ministry told ABC News three people were killed and 58 were injured in Iranian attacks over the weekend. The people killed were from Pakistan, Nepal, and Bangladesh, according to the statement.

In Kuwait, one person has been killed and 32 others injured since Iran launched strikes on the country, the BBC reported.

It’s not clear to anyone—including Trump—how long he intends to continue the war he just launched.

“I can go long and take over the whole thing, or end it in two or three days and tell the Iranians: ‘See you again in a few years if you start rebuilding [your nuclear and missile programs],’” Trump told Axios in a five-minute phone interview from Mar-a-Lago on Saturday.

He also admitted that U.S. troops may die in the process.

“The lives of courageous American heroes may be lost, and we may have casualties, that often happens in war,” he said in a video he posted early on Saturday morning, wearing no tie and a white USA trucker hat.