Two men have been arrested over the murder of a father and two of his daughters in the state’s northern town of Nankara, police said on Saturday.
Shay Mitchell, 32, and his wife, Rachel Mitchell, were found dead in their home on Thursday morning.
The bodies were found on their bed by a neighbour.
Shays father, Steven Mitchell, and Rachel Mitchell had been living in the town with their two young daughters, a 15-month-old girl and a 6-month old boy, Nankar Police Commissioner Nand Kumar said.
The children were not hurt, and the children were told to call police as soon as possible, Kumar said at a news conference.
The Mitchells were found with their hands bound and had been raped, he said.
Steven Mitchell’s wife told police she had left the home for a day and returned to find her husband tied up in a bedroom, police added.
She said she went to call her husband but he was nowhere to be found.
Steven was the father of the children and had previously been a member of the Mitchell family, according to Kumar.
Steven had been an employee of a private business and had worked for the local government, the commissioner said.
He was known to be involved in social activities and had recently moved to Nankari from Nankamgarh, about 80 kilometres (50 miles) away.
Nankara Police Commissioner Ajay Kumar said the investigation was ongoing.