Police said that BJP worker Manav Sharma wanted to lodge the complaint at Jorasanko thana in central Kolkata but later emailed it to the city police commissioner following advice of police officials.
His complaint said, "On December 1, Chief Minister Mamata Banerjee had attacked Indian Army in an unprecedented manner. She maligned the image of Indian Army, wilfully with nefarious political motives, through uncorroborated allegations and baseless insinuations. She alleged that Indian Army was 'colluding and conspiring' against her government. It is a serious attempt to misinform public."
Angered by the deployment of army personnel at toll plazas on National Highways in the state, Banerjee on December 1 had accused the Modi government of imposing an undeclared Emergency.
The complaint further said, "On various occasions, Ms Banerjee denounced the post of Prime Minister of India with baseless insinuations and even threatened him with dire consequences. We therefore ask you to treat this complaint as FIR against her and take strictest legal actions."