Cyberabad EOW is probing three cases against Nanavath Bhupal Naik in an alleged ₹670-crore investment scam involving around 7,400 investors. HYDERABAD: A former mason and petrol pump attendant is the alleged mastermind of a ₹670-crore investment fraud involving around 7,400 investors across the country, according to the Cyberabad Economic Offences Wing (EOW), which is investigating three cases against Nanavath Bhupal Naik, a native of Vikarabad district.