Residents of the couriers' hometown report being intimidated by intelligence agencies, which are under the spotlight today after a prominent Pakistani journalist was found dead.
One day after three US soldiers were killed in the north, the widely anticipated backlash at US troops operating on Pakistani soil has yet to erupt.
More than 40 people were killed in a suicide bombing Monday. It's part of a fresh Taliban bid to engage the Army on several fronts ahead of the Army's planned offensive in South Waziristan.
The US envoy said it was unclear if the military had defeated the Taliban in the region or simply driven them underground.
On Tuesday, the military also began bombing northwestern Buner District, expanding a new offensive against the Taliban.