Iran’s foreign ministry says Tehran has seen positive steps in recent negotiations on Iran's nuclear issue, though claims they do not meet regime demands.

"We have seen [a] moving away from the non-constructive atmosphere and destructive politics in the opposite parties," Nasser Kanaani told a weekly presser on Monday.

Seemingly referring to covert talks with the US, which the US continues to deny, Kanaani also said however, that the talks are still "not enough", though did not elaborate further.

About two weeks ago, another round of negotiations was held between Ali Bagheri-Kani, Iran's Chief Nuclear Negotiator, and Enrique Mora, the Deputy Secretary General for Political Affairs and Director of the European External Action Service, in Doha.

One day after the meeting, CNN quoted an informed source as saying that the discussion appears to be “leading to positive developments on many issues.”

According to CNN, it seems a momentum is building to revive the talks over Iran's expanding nuclear program.

CNN also added that the meeting focused on key sticking points, including nuclear enrichment levels and Iranian cooperation with the International Atomic Energy Agency.

However, on Sunday, the Guardian wrote that the three European countries that signed the JCPOA plan to breach the JCPOA for the first time by refusing to lift sanctions against the Islamic Republic.

In recent days, the forced leave of the United States Special Representative for Iran Robert Malley, has fueled the uncertainties about the talks between the United States and Tehran.