The students fell unconscious at the school ground during assembly in the morning, school sources said.

Among them, five were admitted to Mirzapur Kumudini Hospital. They are Shohag, Hassan, Khalid, Sagar and Zahir. Of them, Shohag, Hassan and Khalid are students of Class 10 while Sagar and Zahir are students of Class 7.

The authorities of SK Pilot Boys' High School and the adjoining SK Pilot Girls' High School closed down their schools following panic among both the students and guardians.

Mirzapur Upazila Nirbahi Officer (UNO) Emdadullah visited the hospital and saw the ailing students.

When contacted, the UNO said to The Daily Star the students might have attacked by the disease due to physical weakness. Because, many of them come to school without taking breakfast, he said.

This is the first such incident in any school in Tangail.