A 82-year-old woman, her three daughters and a male guard were found dead inside a house here on 7 October, police said.
Deputy Commissioner of Police Nupur Prasad told IANS that the four women belonging to the Jindal family were found dead at their house in Shahdara's Mansarovar Park area.
The deceased have been identified as Urmila Jindal, and her daughters Sangeeta, 56, Nupur, 48, and Anjali, 38. The guard has been identified as Rakesh, 42.
The police control room received a call about the incident around 7 a.m.
Preliminary investigation showed there was "no forced entry" into the house and no valuables were stolen, a police officer said.