States due to the purchase of S-400 missile system. CEO of Rostec Sergey Chemezov, said, "If our Turkish colleagues express a desire, we are ready to work out the deliveries of Su-35 fighter jets". Previously in May 2019, Sergey Chemezov had said that Russia was ready to cooperate with Turkey on the export and local production of the Su-57. Iran Following the Russian purchase of Iranian suicide drones during the invasion in Ukraine, the Islamic Republic of Iran Air Force (IRIAF) is reportedly considering the procuremeent of the Sukhoi Su-35 in exchange for further delivery of ammunition, drones and ballistic missiles to the Russian Armed Forces, according to US officials. It was also reported that training of Iranian pilots has begun in spring 2022 and that the aircraft may be delivered in 2023. The deal may include 24 Su-35 jets originally built for Egypt, that have not been handed over so far. The deal was confirmed by Iranian state-owned media Tasnim news agency on 28 December 2022 and on 15 January 2023 by an Iranian MP who said that supplies will begin in the spring and also said that Iran has ordered from Russia air defense and missile systems as well as helicopters. Others Following the deployment to Syria of several new Russian military systems, various countries had reportedly expressed interest in the Su-35. These countries included Algeria, Egypt, and Vietnam. Other countries that had also expressed interest in the aircraft include Kazakhstan, North Korea, and Pakistan although a Russian official denied that the country was in talks with the latter about the Su-35. Sudan has reportedly also expressed an interest in acquiring of the Su-35 fighters during the Sudanese president Omar Hassan al-Bashir's visitation of Moscow in November 2017. Failed bids Brazil In the mid-1990s, Brazilian and Russian authorities conducted talks on the possible acquisition of the Su-27M. In 2001, the Brazilian government launched the F-X tender, the objective of which was to procure at least 12 aircraft to replace the Brazilian Air Force's ageing aircraft, primarily the Mirage IIIs. Since the Brazilian government was also looking to develop the country's aerospace and defence industries, Sukhoi partnered with the Brazilian defence contractor Avibras during the tender. The two companies submitted the Su-27M to the US$700-million tender, and included an offset agreement wherein the Brazilian industry would have participated in the manufacturing of certain aircraft equipment. The tender was suspended