A 35-year-old man died under suspicious circumstances while undergoing treatment at private hospital area in the night on Saturday Nishatpura police have started investigation into the deathThe deceased identified as Gyan Prakash Mishra was rushed to the hospital after he reported illnessPolice were informed that he reported illnessWhether he took poison or was poisoned is a matter of investigation said a policeThe deceased was a resident of Sanjeev Nagar and was undergoing treatment at a private hospital few days ago and succumbed to death on SaturdayThe deceased used to work with a contractorIn the initial investigation the family members told police that deceased used to fight with the family members after having liquorThe police have registered a case under section 174 of the CrPC and started further investigation