Pakistan will boycott an upcoming conference on the future of Afghanistan in protest of a NATO airstrike that accidentally killed 24 Pakistani soldiers Nov. 26.
A preliminary U.S. military report suggests the Taliban may have lured NATO forces into attacking friendly Pakistani border posts.
Some reports call Saturday's NATO attack a case of mistaken identity. The assault was launched after the Taliban attacked a joint U.S.-Afghan patrol.
While pursuing the enemy, U.S. forces mistook Pakistani troops for a Taliban encampment and called in for air support from an AC-130 gunship and Apache attack helicopters.
In response to the attack, Pakistan closed two border crossings used by the U.S. military to re-supply troops in Afghanistan. They also want to close an air base used for American drones.
Brig. Gen. Stephen Clark, an Air Force special operations officer, has been appointed to lead the probe of the incident.
Clark has been ordered to include input from the NATO-led forces in Afghanistan, as well as representatives from the Afghan and Pakistani governments.
Meanwhile, the State Department issued a new warning for U.S. citizens living in Pakistan to be on guard for possible retaliation.
Officials also said some U.S. government personnel working in Pakistan were being recalled to Islamabad.