“Our cup of patience has overflowed. Now it is open war between us and you (Afghanistan),” Pakistani Defence Minister Khawaja Muhammad Asif said on Friday.

The strikes threaten to unleash a protracted conflict along the 2,600-km (1,615-mile) frontier with relations between Kabul and Islamabad shattered by a long-running dispute over Pakistan’s accusation that Afghanistan harbours militants carrying out attacks across the border.