A retired lecturer Mohinder Singh (74) was found murdered in his house at Green Park Colony in the Tripuri police station area on the night of May 26.
The deceased was living alone as his wife had passed away. His daughter is married and both his sons are settled abroad.
A domestic help noticed the body lying in a pool of blood as she entered the house in the morning. She called the neighbours, who called the police. The SSP, Hardial Singh Mann, reached the spot and asked officials to collect forensic evidence, including finger prints.
The police have asked for call detail report of telephone numbers, which the deceased was using. An FIR under section 302, IPC, has been registered at police station, Tripuri, and the body has been sent for post-mortem examination.