The incident took place in Islam Qala village of the restive district on Saturday evening and as a result huge quantity of arms and ammunitions of the militants were destroyed, the statement added, Xinhua reported.
The weapon cache blast came on the same day of inking a peace deal between the United States and the Taliban group which paves the way for the withdrawal of the US-led coalition forces from Afghanistan.
Taliban militants agreed on a seven-day reduction in violence on Feb. 22 ahead of inking the agreement with the US.