The first set of US sanctions against Iran that had been eased under the landmark nuclear accord have gone back into effect under an executive order signed by President Donald Trump.
The sanctions target financial transactions that involve US dollars, Iran's automotive sector, the purchase of commercial planes and metals including gold.
More US sanctions targeting Iran's oil sector and central bank are to be reimposed in early November.
In an early-morning tweet, Trump said the re-imposition of sanctions mean, "Anyone doing business with Iran will NOT be doing business with the United States."
"I am asking for WORLD PEACE, nothing less!"
Trump pulled the US out of the international accord limiting Iran's nuclear activities three months ago, declaring that the landmark 2015 agreement was "horrible" and left the Iranian government flush with cash to fuel conflict in the Middle East.
