A team of inspectors from the United Nations nuclear agency has visited a heavy water reactor in Iran.
Iranian state media reports Monday's inspection of the Arak facility took five hours. The facility will produce plutonium once it is completed.
Foreign Ministry spokesman Mohammad Ali Hosseini says another team from the IAEA will visit Iran on August 6 to work out a framework for inspecting the Natanz uranium enrichment facility.
Iran has agreed to allow the inspections as part of a deal to resolve questions about its nuclear activities.
Plutonium and highly enriched uranium can be used to build nuclear weapons.
The U.N. Security Council has imposed two sets of sanctions on Iran because of its refusal to suspend uranium enrichment.
The United States and its Western allies accuse Iran of trying to develop nuclear weapons, but Iran says its atomic program is for peaceful purposes.
Some information for this report was provided by AFP, AP and Reuters.