A 47-year-old Navi Mumbai man was allegedly duped of Rs 46 lakh by fraudsters posing as officials from the Mumbai cyber police, who threatened to register a case of money laundering and drugs against him, police said on Friday, reported news agency PTI.

The police on Thursday registered a case under section 420 (cheating) and other relevant provisions of the Indian Penal Code and Information Technology Act against four persons, an official told PTI.