The body was recovered a couple of hours after Gayatri Devi, a resident of Balajipuram in Sadar Bazaar police station area, left home for market.
"Prima facie it appears that she was beaten up by iron rods...," the police officer said.
Gayatri Devi was living with her daughter-in-law as her husband was posted in Mumbai and son working in Gurgaon.
Police have ruled out the possibility of loot as motive as gold chain on her neck, rings and the purse containing over Rs. 800 were found intact.