Vietnam Prime Minister Nguyen Tan Dung, who undertakes his maiden visit to India early next month, has sought Indian investment in its energy sector, including civil nuclear power.
North Korean pair Ryom Tae Ok and Kim Ju Sik ended their Olympic adventure winning over the home crowd's hearts.
The G-4 foreign ministers' grouping, that includes India, on Thursday called for urgent reform of the United Nations, including the Security Council, an issue that India has emphasised for the past several years.
The Russians had appealed their exclusion from the Games by the International Olympic Committee (IOC) over the doping scandal from the 2014 Sochi Games.