The relationship between Pakistan and USA appears to be in crises when a cross-border air attack by NATO forces killed 27 Pakistani soldiers.
NATO described the killings as a “tragic unintended incident” and said an investigation was underway. A Western official and an Afghan security official who requested anonymity said NATO troops were responding to fire from across the border.
Both officials agreed the mountainous terrain in the Pak-Afghan border makes identifying between a foe and friend very difficult.
Militants often attack from the Pakistan Border or flee towards it after attacking making it impossible for the NATO troops to follow them as United Nations mandates that NATO troops cannot cross into other countries.
What is clear is the incident could destabilize U.S. efforts to improve ties with Pakistan so that the regional power helps stabilize Afghanistan before NATO combat troops go home by the end of 2014.
Thousands gathered outside the American consulate in the city of Karachi to protest against the NATO attack.
The NATO attack shows the difficulties faced by the United States as it tries to secure the unruly border area that is home to some of the world’s most dangerous militant groups who have made the harsh mountainous landscape their home.
Pakistan later said in a statement that the attack was an unprovoked assault and has said it reserves the right to retaliate.