A 66-year-old businessman and his three employees were Monday found dead inside his home here, police said.
The man was found gagged, his hands and legs tied to a chair and his throat slit.
Businessman Bajrang Lal Bokadia, his 40-year-old driver Vinod Dubey, 35-year-old cook Bhola Singh and 18-year-old domestic help Anand were found dead inside the businessman's ground floor house at Vivek Vihar in east Delhi.
The bodies were found by Bokadia's associate Subhash Sethia, who had come to meet him at around 8 a.m.
The bodies of the other three were found lying on the floor and had injury marks, police said.
Sethia found the main gate of the house open, and upon entering, he saw the bodies and called police.
Police have informed Bokadia's son Pawan and daughter Preeti, who are married and settled in Mumbai. The businessman's 62-year-old wife, Pushpa, had gone to attend a religious function at their native place in Rajasthan.
Police have questioned several people, including his relatives. Four glasses and a drilling machine were found near the bodies.
"There is a possibility of robbery or personal enmity," a police official said.
Bokadia was from the Jain community and was the vice president of a local religious centre in Vivek Vihar called Oswal Bhavan. He also owned a rubber factory in east Delhi.
Bhola and Anand lived in a servant room in the house while Dubey lived in rented accommodation in the same area.
Residents of the area protested outside Boakdia's house, alleging inadequate police patrolling as the reason behind the killings. The protestors demanded the suspension of the local station house officer.
Owing to pressure of residents, the Delhi police transferred the investigation of the case to the Crime Branch.
"I am shocked. It could happen to any one of us. There is no police patrolling in the area and we want our security," Badri Sharma, Bokadia's neighbour, told IANS.
Bokadia's one storey house is at the corner of two adjoining roads. A railway track runs a few meters away. Police suspect the involvement of Bangladeshi criminals in the murders.
"The modus-operandi is as same as used by Bangladeshi criminals who are usually involved in such robberies. They target houses near railway tracks," an investigator told IANS.
Police have also not ruled out the possibility of personal enmity.
They have questioned a servant who was reportedly the last visitor to the house on Sunday. He told investigators that he saw a woman inside the house. Police is also searching for the woman.
