Body of the deceased was found hanging yesterday from the tree in the village here, they said.
The youth had eloped with a farmer's minor daughter, who was also from the same village, on the intervening night of June 20-21, police said.
Family members of the boy has alleged that the youth was killed by the girl's family, they said.
Police today booked five persons, including family members of the girl and two panchayat members.