DUBAI, United Arab Emirates (AP) — U.S. President Donald Trump on Monday threatened widespread destruction of Iran’s energy resources and other vital infrastructure if a deal to end the war with Tehran is not reached soon.

In a social media post, Trump said “great progress is being made” in talks with Iran to end military operations but bristled that if a deal is not reached and and if the strategic Hormuz Strait is not immediately reopened, the U.S. would broaden its offensive by “completely obliterating all of their Electric Generating Plants, Oil Wells and Kharg Island (and possibly all desalinization plants!).”

On the ground, the war showed no sign of letting up: Tehran struck a key water and electrical plant in Kuwait, and an oil refinery in Israel came under attack. Israel and the U.S. launched a new wave of strikes on Iran.

Trump’s social media post and earlier comments in an interview with the Financial Times that suggested American troops could seize the country’s Kharg Island export hub highlight how he has repeatedly said that talks with Iran are ongoing — and even going well — though Tehran denies negotiating directly. But at the same time, he has continually ramped up his threats, as thousands more Marines and other U.S. troops pour into the Middle East.