Mukesh Ambani. File photo

The email demanding Rs20 crore (Rs200 million) threatens to shoot Ambani, 66, if he fails to cough out the amount.

However, according to local media reports the first email seeking Rs20 crore along with a threat of shooting him dead if the demand was not met was followed by another a threat email seeking Rs200 crore on Saturday,

A company source, while confirming the development, declined to comment saying that the police are probing the matter.

A complaint has been registered by the Gamdevi Police Station and investigations are launched into the antecedents of the email threat-given.

Earlier in the past few years, Ambani and his family have been threatened on multiple occasions and there were threats to blow up his iconic Antilla residence in south Mumbai.