The victim died at a Delhi hospital on Tuesday, a fortnight after she was brutally gang-raped and tortured by four upper-caste men while she was out with her mother in the fields of Hathras, UP.
NCW Chief Rekha Sharma tweeted asking, why the family was not allowed to attend the cremation and why it was held at night.
Meanwhile, the Dalit community leaders and women's rights activists claim that the early morning cremation was done to prevent any extreme protests in the village.
Calling it as the newest low, and nothing of this sort happened in the Nirbhaya case, women's rights activist and head of People Against Rape in India (PARI) Yogita Bhayana condemned the incident and described it as "something beyond human rights violation" and said the family deserves an answer.
Secretary of the All India Progressive Women's Association, Kavita Krishnan, said that the girl and her family were being denied dignity in death and mourning.