The nuclear plant 18 km from the Iranian city of Bushehr. Photo by EPA/BGNES
Representatives of Russia and Iran signed Tuesday an agreement under which the Russian company Rosatom is to build eight units for Iranian nuclear plants.
Russia will also provide the fuel to be used at the reactors, the daily Vedomosti reports.
Four of the units will be installed into the Bushehr NPP the construction of which Rosatom completed last year.
The International Atomic Energy Agency (IAEA) will be safeguard the non-proliferation of nuclear technologies for military purposes.
Iran has been subject to a few rounds of international sanctions over what is often described as its "controversial" nuclear program.
Tehran however insists it only uses atomic energy for peaceful ends.
New talks on the issue are due between Iran and various world leaders on November 24.
Construction of Bushehr NPP started in the 1970s, but the Siemens-Telefunken joint venture abandoned the project in a few years.