(CNN) — The US special envoy for women, girls and human rights in Afghanistan said on Tuesday she was concerned by reports that around 80 female students were suspected of being poisoned over the weekend.

“Concerned by reports that almost 80 girls have been poisoned in their schools. All measures must be taken to ensure the safety of all children,” she posted. Rina Amiri on Twitter.

UNICEF Afghanistan also expressed concern over Monday’s incident.

“@UNICEFAfg is concerned to learn of an alleged incident yesterday in which approximately 80 girls and women fell ill at two schools in Sanchark district, northern Afghanistan,” she posted. UNICEF Afghanistan on Twitter.

.@UNICEFAfg is concerned to learn of an alleged incident yesterday in which around 80 girls and women fell ill at two schools in Sanchark district in northern Afghanistan. We wish everyone affected a speedy recovery.

— UNICEF Afghanistan (@UNICEFAfg) June 5, 2023

About 80 primary school students, mostly girls, are believed to have been poisoned over the weekend and taken to hospital in Afghanistan’s Sangcharak district, chief Sar-e-Pul Mohammad Rahmani told CNN. from the Education Department of the Northern Province of Afghanistan.

Rahmani, who claims to have spoken directly to the police, told CNN that the provincial police department’s intelligence unit is still investigating the case, adding that at this time authorities are unclear on the culprit, the motive or the possible type of poison used.