"The Afghan people know that the terrorists and the Taliban are doing these things to threaten girls and stop them going to school," [police spokesman Khalilullah] Aseer said last week. "That's something we and the people believe. Now we are implementing democracy in Afghanistan and we want girls to be educated, but the government's enemies don't want this."
But earlier this week, the Taliban denied responsibility, instead blaming U.S. and NATO forces for the poisonings in an attempt to "defame" the insurgent group.
There have been several instances of girls being poisoned in schools in recent years.
Image: Poison, via Shutterstock.