IRNA, quoting an informed source, added that Iranian Deputy Foreign Minister for Political Affairs Ali Bagheri Kani is pursuing the sanctions removal talks.
The source also said Tehran and Washington are only exchanging messages like before.
Some media outlets recently claimed that Iran and the US are holding one-on-one negotiations.
Following the US withdrawal from the 2015 Iran nuclear deal under former president Donald Trump, Tehran has rejected direct talks with Washington.
