India and Russia on Thursday signed nine agreements, including one which will see Russia help India build nuclear plants in Tamil Nadu and other places in the country.
The nine agreements, signed by visiting Russian President Vladimir Putin and Indian Prime Minister Manmohan Singh here after their talks, also cover the fields such as oil and gas, space, defense and high technology.
The two leaders also signed a memorandum of intent of civil nuclear cooperation.
After the signing ceremony, Prime Minister Singh said energy security is the most important dimension of the strategic relationship between India and Russia.
"We appreciate Russia's help in lifting international restrictions in civil nuclear cooperation," said the Indian prime minister.
Putin, who arrived here earlier Thursday for a two-day visit, was received by Singh at the Air Force airport in New Delhi.
After a welcome ceremony, Putin and Singh headed straight to the Indian Prime Minister's office, Hyderabad House, from the airport for talks.
Indian media said that Putin's fourth visit to India signals a new chapter in relationship between the two traditional friends.
During his visit, Putin is expected to meet the ruling United Progressive Alliance coalition chairman Sonia Gandhi and President Abdul Kalam and top business leaders of India.
The Russian president is scheduled to leave here for home Friday evening after attending the Indian Republic Day parade.