The deceased were residents of Kaserpada under the Chakradhar Nagar police station limits.
Their son Umakant works with a private firm in Kolkata while his married sisters live at different places, police said.
Umakant had requested his friends to check on his parents as his father was not responding to his phone calls for the last two days.
When neighbours of the Nagayachs entered their house, they found the elderly man lying dead on the floor while Sarswati’s body was found on a bed, police said.
Prima facie, the elderly man had a fatal fall while his wife, who was an Alzheimer’s patient, died of natural causes, a police official said.
Preliminary investigation ruled out any foul play.
A case has been lodged, and a further probe is underway, the official added. PTI COR NSK