The leaders of Iran , Russia , Kazakhstan , Turkmenistan and Azerbaijan also met Tuesday to reach agreement on issues relating to the sharing and regulating of the Caspian Sea -- the world 's largest inland body of water . 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 ''
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 ''