NCRI – Europeans have called on the clerical regime to reverse its decision to resume nuclear fuel research.
Germany said it viewed the announcement with "concern" and said it could "throw into doubt the exploratory talks" scheduled to be held on 18 January.
France said Iran’s decision was "very worrying" and would violate UN demands.
The US and EU do not want the clerical regime to produce fuel suitable for use in nuclear bombs.
"We strongly urge Iran to go back on this announcement which, if it were implemented, would clearly run counter to the demands of the International Atomic Energy Agency’s (IAEA) board of governors," French Foreign Ministry spokesman Jean-Baptiste Mattei told reporters.
"Full doubts remain about the goals of Iran’s nuclear program."
German foreign ministry spokesman Martin Jaeger echoed Mr Mattei’s comments.
"We view the latest announcement from Iran that it will restart its research and development work with concern," he told a press conference.
The two members of the EU3 negotiating team, which also includes the UK, were reacting to comments made on Tuesday by mullahs’ chief nuclear negotiator, Ali Larijani.
Talking to Iranian state-run TV, Larijani said that the regime’s nuclear fuel research was "not negotiable."
"The suspension of Iran’s nuclear research was a mistake and an irrational decision," Larijani said.
"We are not pessimistic about the talks, but at the same time, we warn Europe not to push Iran towards the ‘second scenario’," he said.
Larijani did not elaborate on what Iranian regime’s ‘second scenario’ was but in line with recent terrorist threats to security in the region he said: “Our scenarios are planned in such a way that, if we lose, others in the region will lose too.”