Moscow is also looking to sell Su-57 fighter aircraft to the South Asian nation, Dmitry Shugayev has said Moscow and New Delhi are negotiating the supply of more S-400 surface-to-air missile systems to India, TASS reported on Monday, citing a senior Russian defense official. India has already received three of the five S-400 air defense systems it purchased from Russia for $5.43 billion in 2018. The remaining two are slated for delivery in 2026.  The S-400s played an important role in defending