The deal is likely to be inked during Russian President Vladimir Putin's visit to Goa for the BRICS Summit on October 15-16, sources privy to the transaction said.
Commodities trader Trafigura Group Pte is in talks to buy a minority stake in Essar Oil Ltd, which runs India's second biggest private sector refinery, in a deal that could be valued at around USD6.5 billion, Bloomberg reported.