The Gurugram police on Wednesday arrested Yogender, one of the accused in the Manesar gangrape case.
The police said that the other accused have been identified and efforts are underway to nab them as well.
On May 29, the victim, a young woman was on her way to her parent's house with her nine-month-old baby. The driver of the auto she was travelling in, along with the two other passengers in the vehicle, allegedly dragged her to a vacant spot and raped her.
The men also covered the baby's mouth to stop her from crying, The Times of India reported.
If this was not horrific enough, one of the men then threw her baby at the concrete median verge of the road near the spot.
"I became numb from that point. All I remember is seeing my child's head hitting the road divider," her FIR says, mentions the TOI report.
After the men ran away, the woman picked up her baby and had to wait till dawn till she got another auto.
Police earlier released sketches of the three suspects; PTI Photo
What followed is perhaps even more tragic.
The first hospital the victim went to declared her daughter dead.
The distraught mother, who did not believe it, then took the metro to Tughlakabad in Delhi.
This time too the the doctors informed her that her baby was no more.
It was much later in the day that the woman told her family that what had happened to her and that she had been raped, TOI said.
Speaking to the media on Wednesday, Sandeep Khirwar, Gurugram Commissioner of Police, said that the woman had been desperately hoping that her baby was alive.
"The baby had died in the morning. But the victim was hoping against hope that her child was alive," he said.
The post mortem report has revealed that the cause of death is asphyxia.
The victim is currently being counselled to deal with trauma.
The Commissioner also said that Yogender had confessed to the crime and that all the three accused were drunk at the time of the incident.
The other two have been identified as Jaikesh and Amit and the police are in the look about for them.
Khirwar said that the accused are migrants doing "odd jobs" in the city.
A complaint of gangrape and murder has been filed with the Manesar police station.
"The men in an auto-rickshaw offered me a lift and after a while, started molesting me. When I objected, one of them threw my daughter on the ground after which she died and I was sexually assaulted," the woman said in her complaint.
With IANS inputs