AIRO (AP) — President Donald Trump on Saturday said the U.S. will “obliterate” Iranian power plants if it doesn’t fully open the Strait of Hormuz within 48 hours.

Trump issued the ultimatum in a social media post whole he spent the weekend in Florida.

He said he’s giving Iran exactly 48 hours to open the vital waterway or face a new round of attacks. He said the US would destroy “various POWER PLANTS, STARTING WITH THE BIGGEST ONE FIRST!”

Trump faces increasing pressure to secure the strait as oil prices soar.