Afghanistan authorities have opposed the plans of fencing the Afghan frontier by Pakistan as the latter dispute the demarcation made during the British era. He added that local villagers and the Afghan Border Police retaliated with gunfire.
Clashes are still underway, he said. Three civilians were also wounded, he added.
He said the Afghan security forces have bodies of three Pakistani troops in custody and those would be handed over to Islamabad in accordance with the state-to-state and worldwide protocols.
Earlier this month, Afghanistan accused Pakistan of carrying out air strikes in its Kunar province, causing "massive property damage" - charges Islamabad vehemently denied. Afghanistan, in turn, accuses Islamabad of sheltering the leadership of the Afghan Taliban militants who are battling the Western-backed government in Kabul. Pakistan and Afghanistan share almost 2,600-kilometer, mostly porous, border and both sides routinely accuse each other of initiating cross-border skirmishes.