Russian media quoted Iranian officials as saying on Saturday that the two countries had signed deals worth a collective of $21 billion over the purchase of Russian satellite-related equipment as well as airplanes.
The deals were revealed by Manouchehr Manteghi, the managing director of Iran Aviation Industries Organization (IAIO) in an interview with Sputnik news agency.
Manteghi said the airplanes were Sukhoi Superjet 100 (SSJ-100), adding that the deals over the satellite equipment and the superjects were signed during the visit by a top Iranian delegation to Russia for the MAKS-2015 international air show.
"There is a large share of contracts for the purchase of this type of aircraft," Manteghi stated, not specifying, however, the exact number of jets.
In late August, Iranian Vice President Sorena Sattari told the Russian Kommersant daily that the country was holding active talks with Russia on the purchase of at least two types of military aircraft, the report by Sputnik added.
Tehran was also interested in using Russian rocket carriers to launch satellites into orbit, according to Sattari.
The Superjet 100 is a twin-engine regional passenger jet, which became commercially available in 2011.