The Sukhoi Su-35 (formerly Su-27M; Cyrillic: Сухой Су-35, NATO reporting name: Flanker-E) is a Russian heavy, long-range, one-seat multirole fighter. Developed from the original Su-27 air superiority fighter, it was originally designated Su-27M and later renamed Su-35 by Sukhoi. Due to the similar features and components it contains, the Su-35 is considered a close cousin of the Sukhoi Su-30MKI, a modernized Su-30 variant for India. The original Su-35 has been further developed into the Su-35BM, classed as 4++ generation fighter by its manufacturer. It entered into serial production as the Su-35S. The Su-35 is in service in small numbers with the Russian Air Force.