Iranian general: Trump's threats are 'psychological warfare'

The tweet, which was posted late Sunday night, follows an apparent warning issued by Iran's President Hassan Rouhani, in which he cautioned Americans "must understand that war with Iran is the mother of all wars and peace with Iran is the mother of all peace", according to Iranian state media reports.

On Monday, Donald Trump went on Twitter and threatened to nuke Iran.

"To Iranian President Rouhani", Trump tweeted Sunday night. Rouhani also warned, "Do not play with the lion's tail or else you will regret it".

"You declare war and then you speak of wanting to support the Iranian people", he told the USA president, adding "You are not in a position to incite the Iranian nation against Iran's security and interests".

The heightened rhetoric follows the Trump administration's launch of an offensive of speeches and online communications meant to foment unrest and pressure Iran to end its nuclear program and its support of militant groups, according to USA officials.

All of this comes after Trump effectively tore up the Iran nuclear agreement signed under predecessor Barack Obama by threatening tough new sanctions on Tehran.

Iran has faced increased US pressure and possible sanctions since Trump's decided in May to withdraw the United States from a 2015 worldwide agreement over Iran's nuclear programme.

A top commander in Iran's Revolutionary Guards said his words amounted to "psychological warfare". The sanctions will make any foreign institutions that continue to do business with Iran subject to huge fines and possible blockage from the US financial system.

Jimmy Kimmel is puzzled by President Donald Trump's all-caps tweet toward Iranian President Hassan Rouhani.

Help us grow and continue telling Israel's story to the world. Iran has rejected talks with the US, and Rouhani has accused the USA of stoking an "economic war".

Under the Trump administration, the U.S. has taken an increasingly hostile approach toward Iran.

"If anybody's inciting anything, look no further than to Iran", said White House press secretary Sarah Sanders said.

"Frustrated by no progress w/NK; angered by negative push back post Helsinki, Trump is looking to vent, act tough, and change channel", said Aaron David Miller, a former U.S. diplomat and Middle East negotiator for several administrations.

"The President's been, I think, pretty strong since day one in his language toward Iran".

Asked at the White House if he had concerns about provoking Iran, Trump said simply, "None at all".

All other parties to the deal - Russia, Britain, France, Germany and China - have sought to keep the deal in effect, saying it is working as intended by preventing Iran from obtaining nuclear weapons for now.

Mr Pompeo said despite poor treatment by their leaders, "the proud Iranian people are not staying silent about their Government's many abuses".

Pompeo also slammed Iran's political, judicial and military officials, accusing several by name of participating in rampant corruption, and called its religious leaders "hypocritical holy men" who amassed wealth while allowing their people to suffer.