Iran's state news agency, IRNA, says reports of a second round of talks with the US in Pakistan "are not true."
It accuses the US of making “excessive” demands, contradicting itself and frequently changing positions. IRNA says this, along with the US blockade of Iranian ports and “threatening rhetoric”, has “so far hindered the progress of the negotiations”.
"Under these circumstances, there is no bright prospect for fruitful negotiations," a post on Telegram says, but does not quote any official or institution, the BBC reported, Gazeta Express reports.
This follows messages from two Iranian media outlets linked to the Islamic Revolutionary Guard Corps, which have also cast doubt on Iran's participation.
It has not yet been confirmed whether Iranian officials will participate in the talks, and no named official has clarified Iran's position.