P Malakar, a teacher at St Stephens school, slapped the girl, a class IV student, yesterday for writing the roll number incorrectly during an exam, following which she started bleeding from one of her ears, a police officer of Barrackpore Police Commissionerate said.
The victim's family was also informed and she was taken home. The matter came to light when the girl's parents, joined by some other parents, demonstrated at the school today against the teacher who allegedly assaulted the minor.
An FIR was registered by the girl's parents at Dumdum police station today after the demonstration.
The school authorities refused to comment on the incident while saying they were inquiring into the alleged incident and would go by the directive of the police in the case and action will be taken if anyone was proved guilty.