An Afghan official says renewed clashes at a Pakistan-Afghan border crossing have killed an Afghan border guard and wounded five others.

Pakistan said Wednesday it has dispatched more troops and weapons to the volatile border amid an escalation in tension between the two neighbors.

The Afghan guard is the third fatality since Sunday night, when clashes erupted at the Torkham border crossing over the construction of a gate by Pakistan on allegedly disputed territory.

Afghan border police official Jamal Khan says the guard was killed late Tuesday. Another Afghan guard was killed the first night of the violence and a Pakistani officer wounded in the border clashes died on Tuesday.

Pakistani security officials confirmed the latest exchange of fire but say the cease-fire is now holding.