According to the agency, the explosion took place on Saturday morning in the Darqad district when the children were going to school.
No other details have been provided so far.
In October, two blasts hit the mosque located in Jaw Dara area of Huska Meyna district during Friday prayers. At least 62 people were killed.
Afghanistan has long been suffering from an unstable security situation. The government has been fighting the Taliban* for almost two decades, and the Daesh* terrorist group, which has been operating in Afghanistan since 2015.
*Taliban, Daesh (ISIS, ISIL, IS, Islamic State) are terrorist groups banned in Russia and many other countries.