IRNA - A prominent law expert from Geneva's Graduate Institute of International and Development Studies in separate messages warned US against threatening Iran.

US President Donald Trump, in a new tweet on Monday (July 23), reacted to recent remarks by President Hassan Rouhani who had warned Washington against taking a hostile approach towards Iran.

He chose capital letters to convey his message, something which well demonstrated his fury at what President Rouhani said on Sunday in a reference to the US hostile approach towards Iran: 'Do not play with fire.'

�Iran is an ideological dam standing before dangerous Takfiri ideology; Iran is a physical dam blocking the spread of terror groups; Iran is the main barrage before Int'l drug trafficking and Iran is an obstacle to disruptors of free navigation in the region,� Reza Nasri wrote on his Twitter account.

�If Trump causes a crack in this dam, US political establishment and the international community should know that they'd have to deal with a devastating flood!,� he added.

Meanwhile Iran's Foreign Minister Mohammad Javad zarif in a message reminded the US that the Iranian nation has seen fall of empires.

�COLOR US UNIMPRESSED: The world heard even harsher bluster a few months ago. And Iranians have heard them �albeit more civilized ones�for 40 yrs. We�ve been around for millennia & seen fall of empires, incl our own, which lasted more than the life of some countries. BE CAUTIOUS!,� he said.