The first information report (FIR) was lodged at the Kohima police station yesterday by the Officer on Special Duty (OSD) to the chief minister, police said.
It stated a fake and forged letter of the chief minister is being circulated on social media.
The letter head of the Chief Minister of Nagaland has been forged as also a fake letter number has been given, the FIR stated, adding that the signature of the chief minister has been forged.
Kohima Police said it has registered a case in this connection and investigation is in progress.