President Donald Trump on Tuesday sharply ramped up his threats against Iran, warning “a whole civilization will die tonight” unless the country’s leadership strikes a deal that involves reopening the Strait of Hormuz.

The threat came after U.S. forces overnight struck military targets on Kharg Island, Iran’s main oil export terminal, a White House official confirmed to CNBC.

“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 Tuesday morning on Truth Social.

“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?” he wrote.

“We will find out tonight, one of the most important moments in the long and complex history of the World.”