India has signed 16 deals with Russia during Prime Minister Narendra Modi's visit to Moscow.
Mr Modi told President Vladimir Putin that India sees Russia as a reliable friend and said the countries are cooperating in the international and political arenas more actively, according to Russian news agency TASS.
The agreements signed included helicopter and nuclear reactor manufacturing, railways, solar energy, heavy engineering and hydrocarbons.
Mr Putin said that Russia and India were consistently and confidently developing the strategic partnership.
"I am pleased to note, and I am happy to do that, that we are consistently and confidently developing the privileged strategic partnership between India and Russia," he said.
At an event addressing Indian expats in Moscow, Mr Modi said that Russia has always stood with India and that ties between the countries are "very deep".