An Afghan official says a roadside mine has exploded, killing six children in northern Balkh province.

Dawlat Abad District Gov. Mohammad Karim said Thursday the powerful mine killed six shepherd children Wednesday ages 10, 9 and 8.

No one immediately took responsibility for the attack but Karim blames the Taliban, saying the insurgents planted the mine to target Afghan officials and security forces.

Afghanistan has the highest number of mine victims in the world, which along with other roadside bombs kill or wound an estimated 140 people every month.