Mumbai, Aug 20 - The Anil Dhirubhai Ambani group Thursday accused the petroleum ministry of failing to attract foreign investment in the auctions for oil and natural gas exploration blocks in the country because of its flip-flop, partisan and non-transparent policies.

The auctions under a new exploration policy conducted over the past three years unfortunately reveal the absolute failure of the oil ministry to attract any global capital inflow into the country's upstream hydrocarbons sector, the group charged.

'This is primarily due to absence of a well-defined, transparent and consistent policy regime,' said J.P. Chalasani, chief executive of the group's Reliance Power, reacting to an interview given by the Director General of Hydrocarbons V.K. Sibal.

'Not even one of the top five international oil companies participated in the rounds.'

The oil ministry regulator had said in the interview that the ongoing tussle over gas from the Krishna-Godavari basin between Anil Ambani-led Reliance Natural Resources and his elder brother Mukesh Ambani's Reliance Industries will tarnish India's image as an oil investment destination.

But the Anil Ambani group alluded that the dispute was mainly because of the lack of sanctity the oil ministry attached to concluded contracts. Reliance Industries had declined to supply gas to the Anil Ambani firm on the ground that the oil ministry had not approved the same.