Her body with stab injuries was found in a field.
A case has been registered against unidentified miscreants and the body has been sent for postmortem, Circle Officer AKS Pratap said.
Police said that it seems the woman was first raped and then killed. The postmortem report is awaited, they said.
Furious villagers had blocked a road and had refused to handover the body to the police. Security has been beefed-up in the area, the officer said.
85-year-old raped, killed: Police Press Trust of India Muzaffarnagar July 18, 2017
65-year-old gang-raped by 3 men
Adoor: A 65-year-old woman was gang raped here in the wee hours of Saturday, the police said.
The woman had been living alone in her home. According to police, the victim said she was gang gang raped by three men.
She is being treated in a hospital in Adoor.
The police have registered a case and the probe is on.