Kolkata: An elderly couple was murdered in Netaji Nagar, whose bodies were found on Tuesday morning. Primary investigation has revealed that both the man and woman, identified as Dilip Mukherjee (80) and Swapna Mukherjee (72), were strangled to death around midnight on Monday. It is suspected that the murderers were known to the Mukherjee family, as no sign of forced entry was found.According to sources, on Tuesday morning a woman who used to work at the Mukherjee family’s house located at Ashoke Avenue in Netajinagar as domestic help, arrived and pressed the calling bell. However, despite repeated calling, none responded. Also Read – Bengal family worships Muslim girl as Goddess Durga in Kumari PujaWhen she pushed the door, she found that it was not locked. She then rushed upstairs and found Swapna lying in a pool of blood beside the staircase on the first floor. Dilip was found lying on the bed with a pillow on his face inside his room. Immediately, she screamed and came out of the house. Hearing her scream, neighbours came out of their houses and heard about the incident. Wasting no time, Netaji Nagar police station was informed. Police arrived and started probing the case. Within a few moments of arrival of police from Netaji Nagar police station, sleuths from Homicide Section of Detective Department also reached the spot. A sniffer dog was also brought for investigation. Also Read – Bengal civic volunteer dies in road mishap on national highwayLater, police recovered the bodies and sent them for autopsy examination. During probe it was found that the cupboards and other wardrobes in the house had been ransacked and several valuables are suspected to be missing. As no other person used to live there, police are yet to pinpoint the missing items, if any. In the afternoon, a team from the State Forensic Science Laboratory (SFSL) went to the spot and collected samples. According to Wasim Raja, senior scientist of SFSL, preliminary probe indicated towards homicide, but the exact cause of death can be identified only after autopsy examination. Several fingerprints were also found but have not been identified yet. During the probe, police came to know that the elderly couple had no issues and their property is worth crores. They also came to know that some promoters were contacting the Mukherjee family to sell the house and land to them. A few of such promoters had also visited their home and tried to convince them. Police are checking who were in contact with the family in order to purchase their house. They also got hold of some CCTV footages, which are being checked. A few of the relatives of the couple have been detained and are being questioned. Police are looking into the possibility of greed for property being a motive.