US Secretary of State Hillary Clinton said Sunday that international powers would not wait forever for Iran to prove it was not developing nuclear bombs. British foreign minister David Miliband, whom Clinton met in London, said Iran would never have a better opportunity to establish normal ties with the rest of the world but that it had to start behaving like a “normal country”. Iran agreed at a meeting with six world powers in Geneva on Oct. 1 to allow U.N. experts access to a newly disclosed uranium enrichment plant near the city of Qom. Clinton said the meeting was a constructive beginning but added that it had to be followed by action. “The international community will not wait indefinitely for evidence that Iran is prepared to live up to its international obligations,” Clinton said at a news conference. Iran suggested Sunday that it may embark on further refining of uranium – comments likely to add to concern among Western powers, which suspect Tehran is seeking to develop nuclear bombs. Iran denies the charge. Negotiations are due on Oct. 19 in Vienna on a proposal to send Iranian uranium abroad for processing and then return it to Tehran.Iran has repeatedly rejected demands to halt its sensitive nuclear work, despite three rounds of UN sanctions since 2006. Progress in the Geneva talks was seen as heading off calls for an immediate round of tougher sanctions in the near future. Britain and the United States are part of a group of six world powers seeking to defuse the row with Iran over its nuclear programme. Miliband said Iran had to earn the right to be trusted on its nuclear programme. “I think that Iran's history of covert, secret programmes ... explains why the international community does not have confidence in the Iranian regime's protestations about the purely peaceful aspects or purely peaceful purposes of their nuclear program,” he said.