The FIR has been registered against MPs Gorakh Prasad Jaiswal, Ramashankar Rajbhar and BSP Rajya Sabha member Salim Ansari and BSP candidate for Bhatpar Rani by-election Brinda Kushwaha for using red beacon light while campaigning, they said.
The FIR was registered at Khampur police station yesterday after the matter came to light, Returning Officer R D pandey said.
The by-election to the seat was necessitated after death of Sports Minister Kameshwar Upadhyay on Oct 29. His son Ashutosh Upadhyay is the SP candidate from the seat.
The polling for the seat would be held on Feb 23.
