The irregularities committed by teachers at Kuli KGS Vidyapith was another reason for the ire of the students, who demonstrated outside the school, police said.
Headmaster Niyat Sheikh was assaulted allegedly by the agitating students when he tried to pacify them.
The students then went on a rampage, ransacking the class rooms and the teacher's room. They then blocked roads for about an hour before being dispersed by police.
"Our officers visited the school and everything is normal now," he said adding that nobody was arrested in connection with the incident.
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In another incident at Pandua in Hooghly district, a school headmaster knifed an assistant teacher and was in turn assaulted by angry locals.
Hoogly Superintendent of police Pravin Tripathy said an altercation broke out at Simlagarh Uttarkhand primary school between headmaster Rajaram Seal and some teachers when he returned after a long absence.
The teachers were also irked by alleged irregularities committed by the headmaster.
Following this, locals forced their way inside the school and severely beat up the headmaster, they said.
Police rushed to the spot and controlled the situation and rushed both of them to a local rural hospital.
Seal was later arrested, Tripathi added.
Meanwhile, state Education Minister Partha Chatterjee in Kolkata blamed the media for "misreporting incidents and linking TMC's name in every dispute."
Claiming that the ruling Trinamool Congress was not involved, he said "You (media) are giving wrong information. There are no Trinamool Congress Chhatra Parishad (TMCP) units in any school in the state... Even when there is no sign of any students' unit, media is linking TMCP's name to it.