Mohammad Javad Zarif
Mohammad Javad ZarifReuters

Iranian Foreign Minister Mohammad Javad Zarif on Thursday tweeted a warning to US President Donald Trump.

"Misconceptions endanger peace," he warned. "Sanctions aren't alternative to war; they ARE war. 'Obliteration'=genocide=war crime. 'Short war' with Iran is an illusion."

"Whoever begins war will not be the one ending it.

"Negotiations and threats are mutually exclusive."

Last week, Trump sent Iran an ultimatum, setting a deadline for the start of negotiations and warning that if Iran refuses to talk, the US will attack for the downing of an American surveillance drone.

On Monday, Trump announced additional sanctions against Iran, which he said were retaliation for the downed drone, and on Tuesday he warned that "any attack on anything American will be met with great and overwhelming force."