Tehran (AsiaNews/Agencies) – The six-power proposal designed to end the standoff between Iran and the international community over the former's nuclear programme contains "positive steps" but also some "ambiguities" that must be removed, said Iran's chief nuclear negotiator Ali Larijani at the end of his meeting with European Union Foreign Policy Chief Javier Solana.

In Tehran Mr Solana presented his Iranian hosts with the proposal agreed upon by the five permanent members of the United Nations Security Council (China, France, great Britain, Russia, United States) and Germany in a final attempt to reach a negotiated settlement to the crisis.

Its terms have not been made public but some sources claim to have learnt some of them. It is expected that Iran will be allowed to buy spare parts for civilian aircraft made by Boeing and Airbus; sanctions on upgrading its air fleet are to be reduced; some restrictions on the use of US technology in agriculture are to be lifted; guaranteed provision of enriched fuel is to be made.

Iranian officials have said they will examine the proposal, but have so far refused to stop enriching uranium. Still Mr Larijani said that "Europe was right to try to use diplomatic negotiations to solve the problem and Iran was open to resuming talks to try to find a logical and well-balanced solution".

For his part Mr Solana said that today's talks were "constructive" and expected a "positive future" to the negotiations, adding that in the next few days further contacts with the Islamic Republic will show what its first reactions to the proposal are.