PITTSBURGH, September 25 (RIA Novosti) - Iran must take steps to restore international trust in the peaceful nature of its nuclear program before the next meeting of international mediators on the issue on October 1, Russia's president said on Friday.

Earlier this week Iran told the International Atomic Energy Agency about a partially-built second uranium enrichment plant. The revelation prompted condemnation from Western powers.

"The [Iran Six] meeting will give Iran an opportunity to show that it is still searching for a diplomatic solution to the problem," Dmitry Medvedev said in a statement on the sidelines of the G20 summit in the U.S.

"We hope Iran will provide convincing proof that it is seeking purely civilian nuclear technology," the statement said.

Medvedev also said Russia is ready to render any assistance to the IAEA in studying new information on Iran's nuclear facilities.

"The Russian side, together with other partners, believes that the IAEA must immediately study this situation in the context of inspection activities regarding Iran's nuclear program," he said.