Even though the latter did not cross into Pakistan's airspace. Yet [1] another Friend-and-Ally Update.

"NATO says Pakistani troops fired at their chopper," from [2] AP, September 25 (thanks to jcb):

KABUL, Afghanistan - NATO says Pakistani troops fired at their helicopters patrolling eastern Afghanistan, but no damage is reported.

In a statement, NATO says its helicopters did not cross into Pakistan's airspace when they came under fire near Tanai district of Khost province.

The shooting follows a number of alleged incursions at the Pakistan-Afghan border in recent days. A drone believed to be operated by the CIA crashed inside Pakistan on Wednesday.

According to the [3] original story, Pakistani "troops and tribesmen" shot it down.