Afghanistan doesn't recognize the so-called Durand Line, the British-drawn boundary between the two countries that cuts through ethnic Pashtun lands, as an international frontier with Pakistan.

WSJ: Afghans Protest After Clash on Pakistani Border

The British-drawn boundary between the two countries is disputed by Afghanistan, which doesn't recognize the so-called Durand Line that cuts through the ethnic Pashtun heartland as an international frontier.

WSJ: Afghan, Pakistani Forces Clash

The British-drawn boundary between the two countries is disputed by Afghanistan, which doesn't recognize as an international frontier the so-called Durand Line that cuts through the ethnic Pashtun heartland.

WSJ: Afghan, Pakistani Forces Clash

Afghan grievances over the frontier with Pakistan date back to its being drawn as the so-called Durand Line by the then colonial power Britain in 1893, the BBC's David Loyn reports from Kabul.

BBC: Second Afghan-Pakistan border clash in a week

There has been no official Pakistani comment on the latest clashes, but a Pakistani foreign ministry spokesman insisted that the Durand Line was the settled frontier, and that Pakistani checkpoints were vital for good border management.

BBC: Second Afghan-Pakistan border clash in a week