President Trump said Monday he's imposing 25% tariffs on goods from all countries that do business with Iran — a sweeping measure as the Trump administration heaps pressure on the Iranian government amid nationwide anti-regime protests.

Axar.az reports, citing CBS news, Mr. Trump wrote on Truth Social that the new tariffs will apply to "any and all business being done with the United States of America." He said the tariffs would take effect immediately.

It's not clear which countries will face the new tariffs. But Iran does billions of dollars' worth of business with one of the U.S.'s largest trading partners — China — and with the United Arab Emirates, an American ally in the Gulf region.