An Afghan border police was killed in a Pakistani forces attack in southern Kandahar province early Thursday morning, local officials said.
The attack took place at about 7 a.m. in Marouf district of Kandahar when Afghan forces tried to prevent a Pakistani outpost from being built on Afghan soil, said Ahmad Zia Durani, Kandahar police chief spokesman.
"The clash continued for an hour with the Pakistani forces using heavy weapons," he said.
He said all the Afghan forces were on alert in response to the attack.
In the past year, hundreds of missiles have reportedly landed in the eastern parts of Afghanistan. Despite there being little impact in terms of human casualties, hundreds of families have been displaced after fleeing their homes because of the threats.
Cross-border shelling from Pakistan and reported occasional Afghan retaliation last year dramatically increased diplomatic tensions between the two countries.
The Durand Line is the 1893 British-drawn border between the two countries, which has been recognized by Pakistan, but not by Afghanistan.