Russian Deputy Chief of Mission Roman Babushkin on Friday said all S-400 air defence missile systems will be delivered to India by 2025.
The production of S-400 missiles to be delivered to India has started, he said.
External Affairs Minister S Jaishankar will visit Russia on March 22 and March 23 to attend a meeting of the Russia-Indian-China trilateral.
The S-400, an upgraded version of the S-300, had previously only been available to the Russian defence forces.
It is manufactured by Almaz-Antey and has been in service in Russia since 2007.
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