According the spokesperson of the provincial police headquarters, there was a training session in Hazrat Sahib Madrasa (religious seminary) in Mastofi village of Andar District on Wednesday night.
Ahmad Fahim Amiree told Shamshad TV that a Taliban commander was training his fighters on how to make explosive devices and detonate them when a bomb accidentally exploded.
He said the blast left seven insurgents, including the commander, killed and two others wounded.
Amiree identified the Taliban commander as Farouq.
Taliban have not yet commented on the report.