India and Russia on Friday signed an agreement covering the building of four new nuclear energy reactors in southern India, as well as a cooperation accord on manned space flight.
Russia becomes the third country to sign an atomic energy agreement with India after a decision in September by the Nuclear Suppliers Group to waive its ban on trade of nuclear technology with India.
The United States and France are the other powers to have signed agreements with New Delhi.
The nuclear agreement covers the building of four atomic reactors at Kudankulam in the southern state of Tamil Nadu. The value of the deal was not given.
Moscow is already building two 1,000-megawatt light water reactors at the site.
The two sides also signed an accord that envisages Russia sending an Indian cosmonaut into space in 2013 and then launch a manned Indian spacecraft in 2015, officials said.
The signing ceremony, attended by reporters, coincided with a visit to New Delhi by Russian President Dmitry Medvedev.