WASHINGTON (AFP) - Diplomacy offers the best way to resolve tensions over Irans nuclear programme but the Pentagon must be ready with military options if needed, the top US military chief said on Monday. No resolution is yet in sight, but I fully support the effort to focus on diplomatic solutions to existing tensions with Iran, Admiral Mike Mullen wrote in a memorandum setting out strategic priorities for the US armed forces in 2010. My belief remains that political means are the best tools to attain regional security and that military force will have limited results, said Mullen, chairman of the Joints Chiefs of Staff. However, should the president call for military options, we must have them ready. The United States and its allies suspect Iran is developing technology to enrich uranium to highly refined levels that would allow it to build a nuclear bomb, a charge Tehran vehemently denies, saying its nuclear program serves peaceful purposes. With a year-end deadline, President Barack Obamas administration has signalled that time is running out for Iran to seize its offer of diplomatic engagement for resolving nuclear and other issues. Washington has raised the threat of a fourth round of UN sanctions, but will need to persuade Russia and China to drop their traditional reluctance to consider tougher measures. Meanwhile, Iranian Foreign Minister Manouchehr Mottaki said Monday that Iran would pursue its nuclear drive in a normal fashion and will produce itself the fuel necessary for its Tehran medical reactor. Nuclear activity will continue in a normal fashion, Mottaki told a news conference as he wrapped up a brief visit to Lebanon. Concerning the fuel needed for the Tehran reactor ... Iran will produce it itself, he said. Iranian President Mahmoud Ahmadinejad told AFP on Friday that Iran was ready to strike a uranium enrichment deal if the United States and the West respect the Islamic Republic and stop making threats. Iran is under three sets of UN sanctions for refusing to suspend enrichment and risks a further round after rejecting a UN-brokered deal to send its low-enriched uranium abroad to be further refined into fuel for the reactor. Enrichment lies at the heart of fears over Irans atomic work as the process to make nuclear fuel can also be used to make the fissile core of an atom bomb in much higher purifications. Manouchehr Mottaki said that one of three American hikers arrested after they allegedly strayed into Iran from Iraq will be judged soon. The case of the three young people who entered Iran illegally is under review, Mottaki told journalists while on an official visit to the Lebanese capital. The investigation of one of them is finished, and the courts will soon deliver their verdict regarding this person, he added, without saying to which person he was referring. Sarah Shourd, 31, Shane Bauer, 27, and Josh Fattal, 27, were arrested on July 31 after allegedly straying across the border from Iraqs Kurdistan region. Irans public prosecutor said last month that the trio faced espionage charges but Mottaki later said they were charged with illegal entry. Last week, US Secretary of State Hillary Clinton urged Iran to free the trio as soon as possible. The three young people who were detained by the Iranians have absolutely no connection with any kind of action against the Iranian state or government, Clinton told reporters. In fact, they were out hiking and unfortunately, apparently, allegedly, walked across an unmarked boundary, Clinton said. We appeal to the Iranian leadership to release these three young people and free them as soon as possible, Clinton said.