Russia is to build 12 nuclear reactors in India according to a deal signed on Thursday.
The agreement was inked during a visit to Russia by Indian Prime Minister Narendra Modi.
At a summit meeting between the two leaders, Russian president Vladimir Putin said the reactors would be built over the next two decades, and that work on the first two is already underway.
Half of the reactors are to make up a power plant in the state of Andhra Pradesh, while the rest are slated for Tamil Nadu.
Meanwhile, a deal is reportedly in the works with US-based Westinghouse to build six nuclear reactors in India.
An unnamed Indian government official told the Reuters news service that this agreement is expected to be finalized in the first half of 2016.
India is aiming to grow its nuclear power capacity to 63 GW by 2032, up from its current 57.8 GW.