The European Union's foreign policy chief has arrived in Tehran to present an incentive deal to convince Iran to stop enriching uranium.
Javier Solana told reporters at the airport the West wants to start a new relationship with Iran based on mutual respect and trust.
Solana is expected to submit the incentive package on Tuesday to Iran's top nuclear negotiator, Ali Larijani. Media reports say he will also meet with Iranian Foreign Minister Manouchehr Mottaki.
The five permanent U.N. Security Council members (the U.S., France, Britain, Russia and China) plus Germany are making the offer. Details have not been disclosed.
But the plan is believed to contain economic and technological incentives for Iran to limit its nuclear activities. It is also believed to include a threat of U.N. sanctions if Iran refuses to cooperate.
A White House spokesman, Tony Snow says there is hope Iran will accept the deal. But he urged patience while Iranian officials examine the offer.
Iranian leaders have said they will review the proposal. But they say there are no plans to suspend uranium enrichment.
The United States and Europe suspect that Iran is trying to develop nuclear weapons -- a charge Tehran denies.
Iran's supreme leader, Ayatollah Ali Khamenei, says the flow of oil to Western consumers will be disrupted if the United States makes what he calls a "wrong move" involving the Islamic republic.