The Petroleum Ministry is mulling filing a defamation suit against an Anil Ambani Group firm for persisting with "false claims" pertaining to government revenues from Reliance Industries KG-D6 fields.

The ministry is contemplating seeking law ministry view on slapping the suit on RNRL over a claim that government share from KG-D6 initially will be just Rs 500 crore, while RIL will earn a super-normal profit of Rs 49,500 crore.