The official said that the police plans to speak to other students before taking any action.
After the incident came to light on Wednesday, the boy's father Prakash Gandhi visited the school to complain against the teacher. However, after not getting a satisfactory response from the school authorities, he lodged a police complaint at the Dadar police station.
In his police complaint, he alleged that the three boys were called out of the classroom, following which their hands were tied and then paraded in classrooms.
"They were also asked to clean school toilets", Gandhi said, adding that the case was registered on Friday evening.
The school authorities or the accused could not be contacted despite repeated attempts.