NATO says Pakistani troops fired at their chopper

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