Seven people have been arrested for the alleged gang-rape and murder of a mentally challenged woman in Rohtak, say police.

The 28-year-old woman's naked body was found in a field near the highway in Haryana's Rohtak, half eaten by animals and with key organs missing. The police said objects had been inserted into her; sticks, stones and condoms were stuffed into her private parts.

The mutilated body was found three days after the woman was reported missing by her sister.