After going through the CCTV footage of cameras near the police station, three persons in the age group of 20-24 years were arrested today in connection with the incident, they said.
Interrogation revealed that the youth was hacked to death and beheaded by one of the accused at Bahour in Puducherry, 13 km from here, last night, due to previous enmity, police said.
After decapitating him, they travelled on a two-wheeler with the head wrapped in a gunny bag before throwing it into the premises of the Reddichavavadi police station last night, the police said.