Pakistani officials on Saturday accused
NATO of conducting a helicopter attack on two military checkpoints at the northwestern border with
Afghanistan, in strikes that military officials said killed at least 25 soldiers.
In response, Pakistan has closed the border crossing, blocking NATO supplies from entering Afghanistan. The strikes are likely to further complicate an already disintegrating relationship with the United States, which has accused Pakistan of not doing enough to stop attacks on American forces in Afghanistan by militants taking shelter in Pakistan’s northwestern tribal areas.