In a disturbing video that has gone viral on social media, a teacher from St John Vianney School, Lucknow, slapped a student 40 times in less than 3 minutes. The student's only fault was that he did not call out "present" during the attendance call.

The brutal behaviour of the teacher was caught on a CCTV camera in the classroom. One can clearly see the teacher slapping the child with both hands alternatively even as the student stands there holding his cheeks. The teacher stops for a few seconds and seems to tell the student to lower his hands and then begins slapping him again.

In between, the video also shows her taking breaks in order to warm up her hands and ease the pain after which she begins hitting him again. The teacher is also seen pushing and pulling the child by his chest and collar.

The father of student said, "School principal asked for the reason behind this inhumane behaviour over which the teacher answered that she got angry", ABP reported. The school's Principal has promised the parents that the school will suspend the teacher.

Meanwhile, the student's father said that his son was absolutely silent after returning from school. Some of his classmates who live in the same locality informed them about what had happened in the classroom. When he went to the school and complained, the father checked the footage and found out how aggressively had the teacher hit the child.

Watch the video here

#WATCH Teacher of Lucknow's St. John Vianney High School repeatedly slaps a student for not standing up on attendance call pic.twitter.com/DWlPfLhS1I August 31, 2017

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