The Paktika provincial governor's office said in a statement Monday that the children triggered the explosion while playing outside Sunday in Surobi district. The statement says the two dead children were about 12 years old, without giving their gender. Another child was seriously wounded.
Last year was the deadliest on record for civilians in the Afghan war, with 3,021 killed, according to U.N. figures. Taliban-affiliated militants were responsible for the vast majority of those deaths.