On information, GOC of Savar Cantonment Maj Gen Ashab Chowdhury rushed to the school and arranged the admission of 29 afflicted students and the teacher in Saver Combined Military Hospital.

Panic spread in villages following the incident.

The authorities declared the school closed for two days.

Hena, a student of class VI, after regaining sense said she felt headache, pains in hands and legs and tendency of vomiting before falling senseless at about 9:30am.

Three affected students who regained senses in a local clinic were sent back home.

Meanwhile, our correspondent reports that the condition of the students of Adiabad Islamia High School and College of Raipura upazila in Narsinghdi district has further improved, and no one was fainted or admitted to the hospital yesterday.

"A total of 30 students were admitted to Narsinghdi District Hospital since Wednesday. Most of them were either treated here and sent to their home or referred to Dhaka Medical College and Hospital (DMCH) for better treatment," Resident Medical Officer (RMO) of Narsinghdi District Hospital Dr Tutul told The Daily Star over telephone.

There are only five students now in the District Hospital, he said, adding that the medical team that came from Dhaka is treating the students and would visit the school spot again to clear the whole picture.

Quoting the special team, the RMO said it is called a mass psychogenic illness that affects mostly children aged between 14 and 15.

"It is a type of psychological problem called mass hysteria. It usually affects the young and females and spreads among those who are staying at the same place," said DMCH Principal and Prof of Medicine MA Foyez, adding that it usually spreads by seeing or hearing from close quarters.

"It is not an incident of infection and there is nothing to be panicked," said Prof Foyez who is supervising the treatment.