Iran's top nuclear negotiator, Ali Larijani (R) and European Union foreign policy chief Javier Solana

European Union foreign policy chief Javier Solana says Iran has made no commitment to suspend uranium enrichment, as demanded by the United Nations Security Council.

In Brussels Wednesday, Solana said his dialogue with Iran on its nuclear program cannot last forever, and that it is up to Iran to decide whether it is time to end the talks.

In a speech outside Tehran, in Hashtgerd, Iran's president, Mahmoud Ahmadinejad, vowed that his country will not give in to coercion over its nuclear program.

But U.S. Secretary of State Condoleezza Rice said it is time for U.N. sanctions against Iran, and she called on the international community to "act accordingly."

Rice, who was speaking in the West Bank city of Ramallah, said the five permanent members of the U.N. Security Council plus Germany may hold a ministerial-level meeting as early as next week on a sanctions push.

Iran has so far ignored an August 31 Security Council deadline to suspend uranium enrichment, which can be used to produce nuclear weapons.

Earlier Wednesday, Iranian state media said the government plans to open its nuclear facilities to foreign tourists to help prove that Iran's atomic program is peaceful.

Some information for this report was provided by AP, AFP and Reuters.