The letter sent by US President Donald Trump, among other things, contains threats against Tehran.

Axar.az reports that this was stated by Iranian Foreign Minister Abbas Araghchi.

"The letter of the US President has been received and carefully studied. There were other aspects of this letter, including threats. This is unacceptable. We will not allow anyone to speak to the Iranian people in threatening language. And of course, efforts have been made to open a window for diplomatic steps," Araghchi said.

It should be noted that Iran delivered its response to US President Donald Trump's letter through Oman.