New Delhi, Dec. 4 -- Flex boards welcoming Russian President Vladimir Putin and Russian national flags were put up across Delhi's Teen Murti Marg on Thursday.

Putin is visiting India at the invitation of Prime Minister Narendra Modi for the 23rd India-Russia Annual Summit. It is his first visit to India in four years.

Ahead of the visit, Kremlin spokesperson Dmitry Peskov said possible discussions could include an additional S-400 missile system and talks on the Su-57 fifth-generation fighter aircraft.

He said the Su-57 is "the best plane in the world," and signalled Moscow's willingness to expand defence technology collaboration, including joint efforts such as BrahMos.

Peskov also noted Russia's aim to bolster cooperation in the civ...