The sources said a group of militants, described by them as Fitna al-Khawarij, attempted to cross into Pakistani territory through the border sector.
As Pakistani security personnel moved to prevent the infiltration, Afghan Taliban forces allegedly opened unprovoked fire on Pakistani border positions, the sources said.
Pakistani security forces responded with heavy weapons, engaging the positions from which the firing was reportedly taking place.
According to security sources, the retaliatory action prevented the suspected militants from crossing the border and caused substantial damage to Afghan Taliban posts.
The sources described the response as immediate and effective, saying Pakistani troops successfully repelled the attempted infiltration and subsequent firing.
The incident marks another reported security confrontation along the Pakistan-Afghanistan border, where concerns over cross-border militant movements and armed exchanges remain a source of tension.
The extent of the reported damage and any casualties were not specified in the information provided by security sources.