The U.N. atomic agency said Tuesday that a high-ranking visit to Iran will take place on February 20-21, beginning a day earlier than had been announced. \"An IAEA statement on 1 February 2012 stated that agency officials would hold a further meeting with Iran in Tehran on 21-22 February,\" the Vienna-based International Atomic Energy Agency said in a communiqué. \"Unfortunately these dates were incorrect; the meetings are in fact scheduled for 20-21 February.\" The visit, following three days of talks in Tehran from January 29-31 which diplomats said achieved little, is aimed at clearing up what the IAEA calls \"all outstanding substantive issues\" surrounding Iran\'s nuclear program. A November report from the IAEA raised suspicions Iran had done work on developing nuclear weapons -- something which Tehran denies -- leading to increased pressure on the country from Washington and the European Union. New York - The Guardian