Iran warned again on Sunday it could revise the level of its co-operation with the international nuclear watchdog after condemnation of its atomic programme but said it has no plans to pull out of the nuclear non-proliferation Treaty (NPT).
Foreign ministry spokesman Hamid Reza Asefi also left open the return of International Atomic Energy Agency (IAEA) inspectors, which Tehran suspended after the strong IAEA resolution against it, but said this would have to be renegotiated.
"The method of co-operation could change if the realities are ignored," Asefi told a press conference, while adding: "The question of co-operation is not at issue."
Asefi was reacting to Saturday's US-backed IAEA resolution condemning Iran for hiding possibly weapons-related nuclear activities.
"We have co-operated with the IAEA and we are still interested in this co-operation because we are clear on our objectives and intentions", he said, recognising that European allies had "done what they could" to assist Iran.
"We were expecting (more) from them, but the Europeans did what they could," Asefi said.
"We have not noticed any violation of their obligations," he added. In October, the German, French and British foreign ministers persuaded Tehran to fully co-operate with the IAEA and suspend uranium enrichment.
Asefi said remarks on Wednesday by Foreign Minister Kamal Kharazi indicating that Tehran could break ties with the IAEA had been misinterpreted.
The United States remains concerned about Iran's attempts to develop a nuclear weapon, Secretary of State Colin Powell said on Sunday but Washington will rely on closer international co-operation to counter the efforts.