Iran has given a mixed response to Western proposals aimed at ending the nuclear standoff.
Tehran says some of the ideas are promising while others are unacceptable, and has announced that it will present its own amendments.
The EU’s foreign policy representative Javier Solana has met his Iranian counterpart Manouchehr Mottaki to discuss the situation.
The international community’s package of incentives for Tehran includes offers of a light-water reactor and a facility for storing atomic fuel, but diplomats on both sides have hinted the main stumbling block remains uranium enrichment.
President Mahmoud Ahmadinejad shows no sign of changing his position that his country has a right to pursue the process for peaceful purposes under the Non-Proliferation Treaty.
The Islamic Republic has been referred to the United Nations Security Council over its nuclear activities. Washington says Tehran must respond to the Western incentives by the time of the G8 summit in July.