Iranian President Putin backs Iran 's `` peaceful '' nuclear program during visit . Putin in Iran to attend summit of the Caspian Sea nations to discuss oil rights . Tehran , Russia set to discuss Russian nuclear program , U.S. push for sanctions . Putin downplay rumors of assassination plot ; Iran says claims are `` baseless ''
Russian President Putin backs Iran 's `` peaceful '' nuclear program during visit . Putin in Tehran to attend summit of Caspian Sea nations to discuss oil rights . Iran , Russia set to discuss Iranian nuclear program , U.S. push for sanctions . Putin downplay rumors of assassination plot ; Iran says claims are `` baseless ''