The reason for the sickness of the students of Kavi Nazrul Higher Secondary School at Tikorberia village under Jalangai police station could not be immediately ascertained.
However, Jalangi Panchayat Samiti president Saiful Islam said it could be either due to Hepatitis B vaccination the students were administered yesterday or due to consumption of contaminated puffed rice today.
As tension mounted in the area after hundreds of people besieged the school, policemen in strength began patrolling the area surrounding the school.