Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Iran Negotiations at Critical Point by Mary Alice Salinas U.S. Secretary of State John Kerry and Iranian Foreign Minister Mohammad Javad Zarif met Sunday in Vienna at a critical point in negotiations on Iran's nuclear program, ahead of a gathering of more key delegates. The half-hour meeting followed late Saturday face-to-face talks between the two key diplomats. Neither side has commented on the meetings. Experts are racing to resolve as many issues as possible as ministers from the six negotiating global powers finalize a comprehensive deal by a self-imposed July 7 deadline. Officials in Vienna confirmed Saturday that a tentative agreement had been reached on the sanctions relief issue, but a senior U.S. administration official warned that ministers must still approve the deal. "Even if and when issues get resolved at an experts' level, there will remain some open issues that can only be decided by ministers," said the U.S. official. WATCH: VOA's Mary Alice Salinas reports from Vienna ''Meanwhile, the top U.N. nuclear watchdog spurred optimism about possible progress on the controversial question involving Western demands that Tehran reveal its past nuclear activities before a final comprehensive deal is reached. International Atomic Energy Agency Director-General Yukiya Amano, told reporters that "with the cooperation from Iran," he expects a complete report from his team within six months on "the possible military dimensions" (PMD) of Iran's nuclear program. ''Western powers believe Iran has worked to develop nuclear weapons technology, something Tehran has denied. Amano said he saw progress when he visited Iran Thursday, but that more work needs to be done. All sides say a deal is within reach. But there are several outstanding issues, one of which is the IAEA's stalled investigation into the PMD. Working on details ''U.S. officials in Vienna said international nuclear and sanctions experts are grinding through details of various issues. A senior U.S. State Department official said "expert groups" are taking advantage of time most of the top ministers involved in talks are out of town to do the detailed hard work involved in the process, noting that it is "clear that there are still big issues that are not resolved." In addition to Kerry and Zarif, Chinese Foreign Minister Wang Yi remained in Vienna throughout the weekend. '' __________________________________________________________________ [1]http://www.voanews.com/content/iranian-negociations-at-critical-poin t/2849469.html References 1. http://www.voanews.com/content/iranian-negociations-at-critical-point/2849469.html