The $5.5 billion deal for five long-range surface-to-air missile systems, which India says it needs to counter a threat from China, was signed in 2018.
Russia has started supplying India with S-400 air defence missile systems, Russian news agencies reported on Sunday citing Dmitry Shugayev, the head of the Russian military cooperation agency.
“Russia has started supplying S-400 air defence system to India, the first division will be delivered by the end of 2021,” said Dmitry Shugaev, Director of Federal Service for Military-Technical Cooperation (FSMTC). The supplies are proceeding on schedule, he added.
In October 2018, India and Russia signed a $5.43 billion deal for five S-400 regiments. Ahead of the scheduled deliveries, two Indian Air Force (IAF) teams have already been trained on the system by the manufacturer Almaz Antey, in Russia.