Iran has cautioned Russia that siding with the US against Iran will harm Moscow's long-term interests. Reacting to Russia's termination of delivery of the sophisticated S-300 missile system to Iran, country’s Foreign Ministry Spokesman Ramin Mehmanparast told reporters in Tehran on Tuesday that Russia's long-term interests would not be realized by getting engaged in US-sponsored games. Iran was expecting at least five S-300 air-defense systems from Russia but Russia rejected the deal arguing that the ban was justified under the UN Resolution 1929 against the Iran. The Iranian spokesperson claimed that the political pressure on Iran to retreat from its peaceful nuclear program will fail.