Mohammad Bagher Ghalibaf, the speaker of Iran's parliament, who was the head of negotiations between Iran and the US in Pakistan, has issued a statement upon his return to Iran.
Responding to comments by US President Donald Trump, he says that "such threats have no effect on Iranians" and Iran will not "surrender to threats", the BBC reported, Gazeta Express reports.
According to Iranian media reports, Ghalibaf addressed Trump, saying, "If you fight, we will fight, if you present yourself with logic, we will respond with logic."
"We will not submit to any threat. If they test our resolve once again, we will teach them an even greater lesson."
Elsewhere in his comments, Ghalibaf said that Tehran had said from the beginning that they "don't trust the Americans" and that they need to "earn" Iran's trust because they attacked Iran twice during negotiations in less than a year.
The war that began on February 28 of this year and the 12-day war in June of last year both began as Iran and the US were engaging in talks over Iran's long-debated nuclear program.