Arrested Mumbai cop Sachin Waze was running his alleged extortion racket from a room in a Nariman Point five-star hotel booked for him for 100 days at a cost of Rs 12 lakh by a businessman, the National Investigation Agency's (NIA) probe has revealed. The policeman had used a fake identity to check into the property, it shows. The probe body, looking into the recent bomb threat against industrialist Mukesh Ambani, has also questioned several police officers in connection with their now-suspended colleague's affairs. Some of them could possibly be arrested in the near future, NIA officials have said.