(AFP) – Iran insisted Thursday that a revived nuclear agreement with major powers remains achievable despite a negative US assessment of two-way talks in Qatar intended to reboot the stalled negotiations.

The US State Department said the EU-brokered proximity talks in the Qatari capital Doha had concluded late Wednesday with "no progress made".

But Iranian Foreign Minister Hossein Amir-Abdollahian said he believed the talks had been "positive" and a deal could still be reached.

"We are determined to continue negotiating until a realistic agreement is reached," he said after a phone call with his Qatari counterpart Sheikh Mohammed bin Abdulrahman Al-Thani, who hosted the indirect talks.

"Our assessment of the recent round of talks in Doha is positive," he said.