The attacker has been identified as Harish, a guest lecturer of the private college in Rajajinagar. According to police sources, the student was assaulted for cracking a joke against the lecturer during the class. The lecturer who lost his temper is seen slapping and hitting the student several times. The entire episode was recorded on a mobile phone by one of his classmates.

Officials at the Rajajinagar police told The Quint they received the video only three days after the incident. A police complaint is yet to be registered by the student or his family.

The police said they have sent a notice to the college. “We have asked the principal to provide the details of incident and the information on the lecturer,” said the official.