( CNN ) -- Russian President Vladimir Putin will meet with Iranian President Mahmoud Ahmadinejad in China next week before international talks are held on Iran 's nuclear program in Moscow , Russia 's state-run RIA-Novosti news agency reported Sunday . The meeting is aimed at allowing Putin to `` feel the heat surrounding the Iranian problem and see how this issue is perceived in Tehran , '' Yuri Ushakov , a former U.S. ambassador who now serves as a Russian foreign policy adviser , told the news agency . Putin and Ahmadinejad will meet on the sidelines of the 12th Shanghai Cooperation Organization summit , to be held June 6-7 in Beijing . The United States , France , Russia , China , Britain and Germany -- the so-called `` P5+1 , a reference to Germany plus the permanent members of the United Nations Security Council -- will meet in Moscow for another round of talks on Iran 's nuclear program June 18-19 . `` We were n't too happy with the results of the last round of talks , but we determined the mutual readiness to continue the discussion , '' Ushakov told RIA-Novosti . At the Moscow meeting , he said , Russia will `` promote the thought that Iran 's right to develop peaceful energy under the oversight of the International Atomic Energy Agency should be approved . '' World powers , particularly Western nations , suspect that Iran wants to build nuclear weapons , although Tehran insists its nuclear program is for peaceful purposes . Last month , during a round of talks with the P5+1 in Baghdad , Iran rejected calls to stop the high enrichment of uranium that can be used for weapons , while the international powers refused Tehran 's demand for an immediate end to sanctions imposed by the United Nations , the United States and the European Union that are crippling its economy . Because 80 % of Iran 's foreign revenues are derived from oil exports , an embargo by the EU set to take effect in July will put further pressure on its economy . Russia historically has been hesitant to support sanctions on Tehran . In November , it called a new round of sanctions `` unacceptable , '' saying they hinder efforts to reach a diplomatic solution . `` Russia sees such extraterritorial measures as unacceptable and against international law , '' said a statement from the Russian Foreign Ministry , issued a day after the new sanctions were announced . `` Such a practice seriously obstructs advancement toward a constructive dialogue with Tehran . Stronger sanction pressure , which some of our partners see almost as a goal in itself , will not encourage Iran to sit down at the negotiating table . '' Just after the Baghdad talks , the U.N. 's IAEA said its inspectors found a high level of enriched uranium in Iran . The nuclear watchdog agency asked Tehran to explain the presence of particles of enrichment levels up to 27 % found in an analysis of environmental samples taken in February at the Fordo fuel enrichment plant near the city of Qom . The previous highest level had been 20 % , typically used for hospital isotopes and research reactors . To build nuclear weapons , 90 % enrichment is required . Iran said in response that the production of such particles `` above the target value '' may happen for `` technical reasons beyond the operator 's control . '' The IAEA said it is `` assessing Iran 's explanation and has requested further details . ''
The two leaders will meet next week in Tehran , according to media reports . An international round of talks on Iran 's nuclear program is scheduled for later this month . World powers are concerned Iran wants to build nuclear weapons . Iran insists its nuclear program is for peaceful purposes .