KUNDUZ -- A mortar bomb blast inside a religious school in Takhar Province Thursday (June 18) killed at least nine students, police said.
"As per initial investigation, the explosion was caused by a mortar that had somehow been carried inside the madrassa," police spokesman Abdul Khalil Aseer told AFP, adding many of the dead were aged under 18.
Six students were wounded in the explosion in Ishkamish District.
Provincial governor's spokesman Muhammad Jawad Hejri confirmed the incident and the toll.
It comes after two deadly blasts this month targeted separate mosques in Kabul.
On June 12, four people were killed when explosives detonated at a mosque in the capital during weekly prayers.
Earlier in the month, a blast at a mosque in the heavily fortified Green Zone killed two people, including a prominent imam.
The latest bloodshed comes as the Taliban and government are preparing to launch much-delayed peace talks aimed at ending the nearly two-decade old conflict in the country.