Indu Sharma, a management student, was allegedly killed by her family on Friday night for marrying outside her caste and against the wishes of her parents.
Police have registered a case against Indu's parents and three others in a murder case and for conspiring to cremate the body under suspicious circumstances.
Indu, who belongs to a Brahmin family, had secretly married Ajay Rohil from the Jat community at the Punjab and Haryana high court on October 10.
Both were third-year students of the bachelor of business administration course at a private college at Israna town, near here. Both belonged to different localities of Panipat town.
According to sources, Indu's family did not approve of their relationship, while the couple decided to get married without their consent.
After the marriage, Indu's family contacted the couple on October 12, assuring her that they approved of the alliance. They took Indu to their house the same day and promised to throw a party on November 24 as a wedding reception.
However, Ajay was informed by his friends on Saturday morning about Indu's mysterious death.
As her family had avoided contacting him, Ajay rushed to the cremation ground with his friends and alleged that Indu's face bore injury marks. He said she had been hurriedly cremated by using petrol on Saturday morning.
Ajay alleged that personnel at the local police post harassed his father and him and did not take timely action. "The personnel misbehaved with me for marrying without the consent of Indu's family. They even handcuffed my father who had gone to 8 Marla Police Post to lodge a complaint about the murder," he said.
When contacted, deputy superintendent of police Varinder Vij said after Ajay approached the police on Saturday morning, claiming that Indu had been killed by her family members, police acted promptly and rushed to the cremation ground.
"The cremation was over before the police could reaact. Since no post-mortem examination was conducted, the cause of death cannot be ascertained. We are keeping options open to see if forensic science or circumstantial evidence could help crack the case," said Vij.
The DSP said that the police were yet to interrogate the family members.