Dhaka, Bangladesh (BBN)– At least 23 schoolgirls fell unconscious on the Dighapotia PN High School in the country’s northern Natore district during assembly on Saturday.

Ten of the schoolgirls fell unconscious at the time of assembly. When the students were being given treatment in the school another 13 girls fell sick, according to reports.

Doctors said the girls were affected by mass hysteria.

BBN/SSR/AD-10Apr11-2:22 am (BST)