The prime minister refused to be drawn into the controversy that top politicians, including ministers, were holding top positions in the Board for Control of Cricket in India (BCCI).
"It is not proper for me to comment. I only hope that politics and sports don`t get mixed," he told the accompanying media on board his special aircraft after ending his five-day visit to Japan and Thailand.
Cricket has been in the midst of a major controversy following a spot fixing scandal involving players in the cash-rich Indian Premier League (IPL).
Delhi Police busted the racket in the just concluded IPL, with the arrest of three players of Rajasthan Royals. This included controversial fast bowler S. Sreesanth.