Russia plans to build eight more nuclear reactor units in Iran, Russian President Vladimir Putin said in an interview published Friday.
Russia also intends to lend Iran 2.2 billion euros (2.5 billion dollars) for financing energy projects, Putin told Azerbaijani state news agency AZERTAC.
The money is slated to fund the construction a thermal power plant near the Persian Gulf city of Bandar Abbas and the electrification of a railway line between the cities of Garmsar and Inceburun in northern Iran, Putin said.
"We will also help our Iranian partners in fulfilling their plan of action for the Iranian nuclear programme, including processing enriched uranium," Putin was quoted as saying.
Putin is scheduled to meet with Iran's President Hassan Rouhani and Azerbaijan's President Ilham Aliyev in the Azerbaijani capital Baku on Monday.
Russia was instrumental in helping Iran reach an international deal to regulate its nuclear programme, allowing sanctions against the country to be lifted.
Iran has insisted that its nuclear programme is peaceful, but Western powers including the United States suspect that it could be used to build a bomb.
Russia previously helped Tehran construct its major power plant near the city of Bushehr. In 2014, Russia signed a deal to build two more reactors at the facility.
In April, Iran confirmed that it received a shipment of S-300 long-range, surface-to-air missile systems from Russia. Russian state news agency RIA Novosti reported that the S-300 deal could have been worth about 900 million dollars.