U.S. President Donald Trump warns Iranian President Hassan Rouhani not to threaten the United States again.
It came after Rouhani cautioned Trump on Sunday over pursuing hostile polices against Tehran.
'NEVER, EVER THREATEN THE UNITED STATES AGAIN OR YOU WILL SUFFER CONSEQUENCES THE LIKES OF WHICH FEW THROUGHOUT HISTORY HAVE EVER SUFFERED BEFORE.' - The U.S. president tweeted, in caps to emphasise his point.
U.S. officials say the tweet is meant to encourage unrest in Iran, and help pressure its government to end both its nuclear program and support for militants.