In October 2018, India had signed a $5 billion deal with Russia to buy five units of the S-400 air defence missile systems
Russia has started the delivery of S-400 surface-to-air missile systems to India, according to a senior Russian official.
Russia’s Director of the Federal Service for Military-Technical Cooperation (FSMTC) Dmitry Shugaev told Sputnik news that the deliveries are going as planned.