The collector Samir Bishnoi received the letter by post three days ago and the police were conducting a probe in this regard, Additional Superintendent of Police, Kondagaon Maheshwar Nag told Bhasha/PTI.
The letter mentions among other things drive against illegal constructions in Kondagaon city and had 'Maowadi-Kondagaon Committee' written at the end. However police suspect that some mischievous persons might have send the letter in the name of Naxals, Nag added.