The boys sustained burn injuries following which the warden and two staff members of a a hostel run by Adi Dravidar Community Welfare Department were arrested on charges of dereliction of duty, police said today.
The Class VII students, staying in one room of the hostel, decided to burn camphor on their palms few days ago after one of them alleged that Rs 110 was missing from his bag.
It is a belief among a section of the community that if the palm is not burnt after burning camphor on it, the person is innocent.