Police have arrested two men for rape and murder in Sonipat town, Indian and six more were being investigated after the victim's mother accused them of involvement in the act.

  The Indian woman was gang-raped and then brutally murdered by men who smashed her skull with bricks after she had threatened to inform authorities.

The 23-year old woman, a laborer, was taken by the men - at least one of whom knew her - by car from near her home in Sonipat to the nearby city of Rohtak, where they raped her, said police.

"When she said to them she would complain, they hammered her skull in with bricks," he said. "The way that they brutalized her is horrific." The body was found in an open field on Thursday.

The mother of the victim had previously registered a complaint against one of the accused for pressuring her daughter into marrying him, but the disagreement was settled between the two parties, said police.

Sexual violence against women is a highly-charged issue in India, where the horrific, fatal gang-rape of a student on a bus in New Delhi in 2012 sparked nationwide protests about entrenched violence against women and the failure of authorities to protect them.