The United States imposed sanctions on Iranian Foreign Minister Mohammad Javad Zarif on Wednesday, the US Treasury Department said on its website with Iranian Supreme Leader Ayatollah Ali Khamenei.
"Javad Zarif implements the ruthless agenda of the Iranian Supreme Leader and is the regime's main spokesman around the world," said Finance Minister Steven Mnuchin in a statement.
Zarif wiped sanctions Twitter states that the US move shows that Washington views him as a "threat".
"It does not affect me or my family because I have no property or interest outside Iran," he said.
The reason for the naming by the US is that I am the "main speaker of Iran in the whole world".
Is the truth really so painful?
It does not affect me or my family because I have no property or interests outside of Iran.
Thank you for considering me such a major threat to your agenda.
̵1; Javad Zarif (@JZarif) 31 July 2019
Tensions between the US and Iran have increased since President Donald Trump withdrew the US from the 2015 nuclear deal and imposed sanctions on Tehran.
Fears of a direct US-Iranian conflict have increased since May. Several attacks on oil tankers in the Gulf, the overthrow of a US surveillance drone by Iran and a plan for US air strikes on Iran last month, which Trump had broken off last minute.
On Wednesday Zarif said that Iran could further reduce its commitments under the International Atomic Energy Agreement unless the European partners try to protect it from US sanctions by ensuring that they sell oil and income.  Zarif also said Tehran was ready to negotiate with rival Saudi Arabia, adding that US Secretary of State Mike Pompeo was not welcome in Iran.
"You do not have to come to Iran," Zarif told reporters and addressed Pompeo. He called Pompeo's offer to visit Iran and speak to the Iranian people a "hypocritical gesture."
On Monday, Pompeo tweeted, "We are not afraid to come to America [Zarif]where he has the right to speak freely." The facts of the [Khamenei] regime are so bad that he does not allow it can I do the same thing in Tehran? "he said, referring to Supreme Leader Ali Hosseini Khamenei.
"What if his people heard the truth unfiltered and unabridged?"
Al Jazeera and news agencies