More than 70 girls in a school in north-east Afghanistan have fallen ill following a suspected poison attack.
About 40 girls have been treated and discharged but 40 others, including three female teachers, are still in hospital, an official told the BBC.
Police said preliminary evidence suggested that poisonous materials had been sprayed in classrooms at Bibi Haji school, in Takhar province.
They believe that Taliban insurgents may be responsible.
The victims, who include girls as young as 10, were taken to hospital on Wednesday after complaining of nausea, headaches and dizziness.
Police spokesman Khalilullah Aseer said he believed Taliban insurgents were trying to spread fear by poisoning the schoolgirls.
Blood samples have been sent to Kabul for further tests.
The BBC's Bilal Sarwary in Kabul says similar events have been reported before, but no conclusive evidence of poisoning has been found.
However Afghan officials say the insurgents and other groups are behind a wave of similar attacks against schoolchildren in several provinces.
In April, more than 100 schoolgirls from Takhar were taken to hospital after drinking water at their school that was suspected to be poisoned.