Russia has repealed a ban prohibiting the delivery of S-300 anti-missile rockets to Iran, according to the Kremlin's press service.
This comes after world powers and Tehran have reached an interim deal on curbing Iran's nuclear work.
The ban was introduced by former President Dmitry Medvedev in 2010, when it cancelled a contract to deliver the advanced missile system to Iran.
"[The presidential] decree lifts the ban on transit through Russian territory, including airlift, and the export from the Russian Federation to the Islamic Republic of Iran, and also the transfer to the Islamic Republic of Iran outside the territory of the Russian Federation, both by sea and by air, of air defence missile systems S-300," read a statement quoted by RIA Novosti.
The decree enters into force upon the president's signature.