The victim, named only as Soni, was the same caste as her groom, but the family did not approve of the relationship, according to a report in The Times of India.
Police said the male relatives of Soni dragged her to a temple in Kaushambi district, in India’s north-east, and hacked her to death.
Kaushambi’s senior superintendent of police, Kripa Shanker Singh, told The Times that Friday’s murder came to light when the victim’s mother accused her husband and son of brutally killing the girl.
“We have arrested Soni’s father and he has confessed to have murdered her for being adamant about wanting to marry the local youth,” police said.
Other men are still being sought in connection with the slaying.