The Ministry of Interior (MoI) in a statement said the Taliban militants had planted the IED in Tahiraha Village of Darqad district.
The statement further added that the school children were on their to school when stepped on IED which killed nine of them.
The explosion also wounded another school child, the Ministry of Interior added in its statement.
The Taliban group has not commented regarding the incident so far.
Taliban militants often use Improvised Explosive Devices to target the security personnel and government officials.
However, majority of such attacks inflict casualties on ordinary civilians.