Nuclear Agency Resumes Talks With Iran on Site Access LONDON - Senior inspectors from the United Nations nuclear watchdog renewed talks with Iran on Friday aimed at securing access to restricted sites where the agency believes scientists may have tested explosives that could be used as triggers for nuclear warheads, officials at the agency said. The discussions at the International Atomic Energy Agency in Vienna are separate from the broader talks between Iran and world powers on its contested nuclear program which are to resume in Moscow later this month after an inconclusive round in Baghdad in May. But the more technical discussions in Vienna are seen as offering a clue to Iran's readiness to adopt a more cooperative attitude as a deadline looms on July 1 for tighter sanctions on its oil and banking industries. Iran says its nuclear program is for peaceful purposes but Western leaders say they suspect it is designed to achieve the capability to build nuclear weapons. In Beijing on Friday, President Hu Jintao urged the visiting Iranian president, Mahmoud Ahmadinejad, to be "flexible and pragmatic" at the talks scheduled for Moscow on June 18 and 19, and to cooperate with the I.A.E.A., news reports said. China is one of the six powers along with the United States, Russia, Britain, France and Germany conducting talks with Iran. Last month, Yukiya Amano, the I.A.E.A. director general, announced after talks in Tehran that basically agreed to a program for his agency's inspectors to gain access to the Parchin site south of Tehran. I.A.E.A. officials said on Friday that the talks were not only about the Parchin site but about creating what the agency calls a "structured approach" over possible military dimensions to the nuclear enrichment program. On Monday, Mr. Amano expressed concern about satellite images taken last month that showed the Iranians had demolished buildings at one site that inspectors have been pressing to visit. He also announced that the talks on access to Parchin would resume on Friday. The announcement seemed to suggest that earlier talk of a breakthrough had been premature, deepening suspicions among Iran's critics that Tehran is using its contacts with outsiders to buy time as it continues nuclear enrichment efforts and possibly conceals evidence sought by international inspectors. Asked on Monday about satellite images taken in late May of the Parchin site, which the agency showed diplomats at a briefing last week, Mr. Amano confirmed that they indicated activities that "include the use of water, demolishing of buildings, removing fences and moving soil." He emphasized that agency inspectors wanted access as soon as possible to Parchin, which is about 20 miles south of Tehran, a request that the Iranians have repeatedly refused. Iran has denied that accusation and has described reported efforts to cleanse the Parchin site as absurd propaganda by its Western adversaries and Israel. Iran has also suggested that before allowing any inspection at Parchin, it wants to see the documents used by the atomic agency as the basis for its suspicions.