Borisov, broadcast by Rossiya-1 TV channel, confirmed the conclusion of the contract, saying that it was "based on long-term cooperation."
READ MORE: India to Avoid US Sanctions Over S-400 Purchase, Journalist Predicts
When asked whether possible US sanctions could not convince India to refrain from signing the contract, Borisov answered affirmatively.
The minister's statement comes following the announcement of Russian state arms exporter Rosoboronexport’s Director General Alexander Mikheev made on Friday that Russia began to implement the contract on supplies of S-400 to India.
The United States voiced its concern over the Indian plans to purchase the S-400 systems, pointing out that sanctions over the deal could not be ruled out.