A senior official said Monday that the U.N nuclear agency believes Iran plans to start enriching uranium at a previously secret facility in 2011, AP reported. The official said the International Atomic Energy Agency also believes that the site near the city of Qom will be able to house 3,000 uranium-enriching centrifuges. The senior international official familiar with a new IAEA report said that number could allow Iran to enrich enough material to be able to arm one nuclear warhead a year. He spoke on condition of anonymity because of the restricted nature of the information. President Barack Obama turned up the pressure Sunday by saying Iran is running out of time to agree on a U.N.-brokered plan to ship its low-enriched enriched uranium out of the country to enrich it to a higher level. The West had hoped this plan would dramatically reduce its stockpile of enriched uranium and thwart any attempts to build nuclear weapons. Iran"s president warned the West not to pressure Tehran over its nuclear program, saying this only makes the country more determined to gain power by advancing its nuclear technology. The comment by Mahmoud Ahmadinejad appeared to be a veiled threat that Iran would try to intensify its efforts to enrich uranium if nuclear negotiations with the international community fail. -- SPA