At least 20 students stormed the college rooms at around 4:00pm and burnt the chairs, tables and benches, police and witnesses said.

The agitating students, backed by outsiders, were demanding withdrawal of the suspension order against the college principal, a teacher said.

AKM Rafiqul Islam, additional divisional commissioner, in an order suspended Principal Abdur Razzak on charge of corruption and misuse of funds on December 1.

Asked about filing a case, Razzak said, "The attackers were students of the college, so, whom will I accuse in the case?"

Officer-in-charge of Boalia Police Station Aslam Iqbal said they cannot move with the incident, as no complaint was filed.