The European Union has proposed an International Atomic Energy Agency resolution calling on Iran to stop all nuclear fuel work.
The draft, proposed by France, Britain, and Germany, will be considered by the U.N. agency Thursday. Delegates from the IAEA have been discussing a response to Iran's decision to resume uranium processing.
Earlier Wednesday, Iran broke United Nations' seals placed on parts of a uranium processing plant, clearing the way for the complete resumption of work at a controversial facility in central Iran.
The U.S. State Department called the move a "negative step," and part of a series of "provocative" actions that further isolate Iran from the international community.
Delegates from the IAEA's 35 member countries have not been able to agree on a response to Iran's uranium processing.
Tehran agreed to suspend uranium conversion last year, to counter U.S. and European suspicions that it was secretly trying to develop fuel for nuclear weapons.
The European Union had threatened to refer Iran to the U.N. Security Council for possible sanctions, if Tehran resumed the suspect fuel work.
Some information for this report provided by AFP and Reuters.