Reliance Industries Chairman Mukesh Ambani has again received a threat email from an unidentified person seeking ₹400 crore, police informed on Tuesday.According to the police officials, the billionaires company received the email on Monday.It is to be noted here that this has been third threat email to Ambani in past one week.Reliance Industries Chairman Mukesh Ambani has received three death threats in three days from the same email. The sender has demanded Rs 400 crores from Ambani now due to non-response to the previous emails. A case has been registered against an unknown person in Gamdevi PS of…— ANI (@ANI) October 31, 2023The initial email, which sought ₹20 crore, was received from an unnamed person on Friday. The industrialists security in-charge then submitted a complaint, which led to the registration of a FIR at the Gamdevi police station in Maharashtra. Another email requesting ₹200 crore was received by the company on Saturday.According to the source, the third email, which quadrupled the demand, was received by the company on Monday.He said that efforts are being made by the Mumbai police, their crime division, and their cyber specialists to identify the emails sender.Last year, a man from Bihars Darbhanga for making death threat calls to Ambani and his family members was arrested by Mumbai Police. The accused had also threatened to blow up the Sir H N Reliance Foundation Hospital in Mumbai.