"There are other factors beyond OPEC that are really behind the spike we have seen in gas (and) in oil. And again, I think in a nutshell, for me, it is underinvestment -- chronic underinvestment," he told CNBC. (https://cnb.cx/3QUez6h)

"OPEC is not behind this price increase."

(Reporting by Jyoti Narayan in Bengaluru; Editing by Edmund Blair)