Additional Chief Judicial Magistrate (CBI) Mahendra Kumar Mehta rejected the plea saying the case was of "serious crime nature that amounts to life imprisonment" hence bail was not granted, defence lawyer A K Jain said.
In the order, the Magistrate also said his court could not grant bail in such cases, Jain told PTI.
53-year-old Nagar, who was arrested by CBI on October 25, was sent to 14-day judicial custody till November 12. Later his judicial custody was extended upto December 9.
The Rajasthan minister of state for dairy and rural industries resigned from the state Cabinet two days after the FIR was registered.