District chief for Sherin Tagab, Syed Luqman confirming the report said the school girls belonged to Islam Qala girls school.
Mr. Luqman further added the incident took place after an unknown individual attacked the compound of the school with toxicant gas, leaving at least three girls unconscious.
He said the number of school girls later increased to 80 after inhaling the poisonous gas.
This comes as several girls were poisoned in north-eastern Takhar province of Afghanistan last month. However, education ministry officials denied militants involvement behind the poisoning of school girls and called it a psychological issue.
Education officials also warned to try those school girls who claims of being poisoned in the future.