As per the complaint filed by the victim's father, 7-year-old Usaidul, who was missing since January 16, was abducted and killed by neighbours Joeb, Labbu and Farhan for a ransom of Rs 10 lakhs, police said.
The child's body was recovered yesterday after the trio was apprehended by the police.
The accused trio confessed to their crime and stated that they had planned to burn the body to hide the evidence, police said.
The police has deployed extra forces in the area.