Iran vowed Sunday to push forward efforts to enrich uranium and to change its relations with the international nuclear watchdog after the UN Security Council imposed sanctions designed to stop the country's disputed nuclear program.

Iran's hard-line President Mahmoud Ahmadinejad said the Security Council would regret voting in favor of the sanctions, saying he was sorry the West lost its chance to make amends with Iran.

Country's government announced Sunday it is starting the installation of 3,000 centrifuge and then an expansion of the program to 54,000 centrifuges, which spin uranium gas into enriched material to produce nuclear fuel.

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