The body of the girl, who had gone missing since December 30, was found half burnt in Radi jungle on the instance of the accused, who have been arrested, police said.
Giving details, police said one of the two accused, Amardeep had lured the girl from her home on the pretext of marriage and afterwards, gangraped her along with his friend Ajay Shah.
When the girl insisted on marriage, the duo slit her throat and burnt her body after drenching it in petrol, police said, adding that they also took away her mobile phone and earrings.
The matter is being probed, they said.