Iran's top nuclear official was scheduled to meet with Russia's atomic energy chief in Moscow on Monday, as international efforts to persuade Tehran to suspend uranium enrichment continue.
Gholamreza Aghazadeh's talks with Federal Nuclear Agency head Sergei Kiriyenko come just days after Kiriyenko was quoted as saying that the controversial Russian-built nuclear plant at Bushehr would start operations in September 2007.
The United States has long objected to the Bushehr plant, saying it could be used by Iran to produce fissionable material for weapons.
Russia eventually worked out a deal with Iran for all the plant's spent fuel to be sent to Russia, eliminating the possibility that Iran could reprocess it for weapons. However, Iran has resisted Russia's proposal to conduct all of Iran's uranium enrichment on Russian soil.