At least 11 students have been killed and another four wounded by a roadside bomb in Paktika province on Thursday.
General Khalilullah Ziayaee, the commander of Paktika province on said that the explosion happened after a school van carrying students hit the bomb.
The explosion happened in Orgun district.
Previously the UN raised deep concerns over a surge in the civilian fatalities in Afghanistan, calling on the warring sides to ensure protection of civilians.