According to police, the deceased has been identified as one Ratan Singh and the incident took place last evening when he was alone at home.
Police said they suspect that Singh's tenant, one Manoj Kumar, was involved in the crime as he was seen with another person in the footage of a CCTV camera installed outside the victim's house. The duo is on the run since the incident was reported, they added.
"The deceased person's tenant, Manoj Kumar, is seen in the CCTV footage fleeing the house with his friend; they are seen carrying some robbed items. Entry inside the house, which was found ransacked, seems to have been friendly," said a senior police official.
There were marks on the victim's neck and arms suggesting that he was strangled to death, police said.
More From This Section
Retired Delhi Transport Corporation employee Singh used to live with his wife and son and daughter-in-law at the house. His son had gone to Gwalior for medical treatment while his wife was visiting Hathras to attend a marriage function.
A case of murder has been registered at MS Park police station.