"The law is there. It is to protect the SCs and STs from atrocities. It was a clear case of atrocity on a weaker section of the society. We do not know why the state government has not slapped it (clauses) against the accused," Minister of State for Home Kiren Rijiju told reporters here.
He said the letter to the Uttar Pradesh government has been sent today.
Five accused-- three brothers Pappu Yadav, Awadhesh Yadav and Urvesh Yadav and constables Chhatrapal Yadav and Sarvesh Yadav ---have been arrested in the case that has sparked nation-wide outrage.
The two teenage girls, who were cousins aged 14 and 15 years, were allegedly gangraped and murdered with their bodies found hanging from a mango tree in a village in Ushait area in Badaun.
The girls went missing on May 27 and their bodies were found the next day.
Badaun is 300 km from Uttar Pradesh capital Lucknow.