Pakistan blocks Nato supply route to Afghanistan | World news | The Guardian: "Pakistan blocked the main Nato supply route into Afghanistan this morning after reports that a Nato helicopter killed three of its soldiers in the second cross-border intrusion in five days.
Border officials said they had orders to block dozens of Nato trucks at the Torkham checkpost on the Khyber pass, hours after the alleged attack in Kurram tribal agency.
According to reports, the Nato aircraft opened fire on a Frontier Corps border post, killing three paramilitary soldiers and wounding at least two others. The corps is charged with guarding the notoriously ill-defined mountain border.
In Kabul a Nato spokesman said it was determining whether the incident was linked to anti-Taliban operations on the Afghan side of the border.
A Pakistan foreign ministry spokesman, Abdul Basit, said Islamabad was also inquiring into the incident. "We will complete our investigation and then formulate our response," he said.
An official with the powerful Inter-Services Intelligence agency took a harder line, saying such aggressive incursions were a "red line" for the military. "We have for a long time given tacit approval for drone strikes. But this is an escalation we will not tolerate," he said.
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