TEHRAN – Iran, Russia, Turkmenistan, and Kazakhstan reached a quadripartite agreement on establishing a railway around the Caspian Sea, Iran’s road and transportation minister said here on Friday.

Mohammad Rahmati added that the railway will link the countries, saying the construction cost is borne by each of the quartet on its own soil.
Totally one billion dollars is needed for the 600-700km railway, of which Iran will build about 70km on its border, he said.
Iran is one of the five states bordering the Caspian Sea, having substantial interests in the region. The other four are Kazakhstan, Azerbaijan, Russia, and Turkmenistan