Bodies of the four youths, in the age-group of 16-20 years, were found from a paddy field in Geruashram under Baganpara police outpost.
The youths have been identified as Raju Boro, Hemant Boro, Khumpha Boro and Bijoy Boro.
The police have launched a search operation in the area to nab the killers, the sources added.