U.S. troops have fired into Pakistani territory at least four times in the last 10 months in cross-border skirmishes that they say are in response to shelling from inside Pakistan, CNN has learned.
The revelation is likely to stoke already tense relations between Pakistan and the United States, which hit a new low after a NATO airstrike last year killed 24 Pakistani soldiers along the volatile border.
While the Taliban and Haqqani network, an Afghan militant group operating from Pakistan's Waziristan province, are generally believed responsible for cross-border attacks against troops, an Afghan army commander says Pakistani soldiers opened fire on him and his men as recently as April 14.
"When we went near the border, we were attacked with an anti-aircraft gun and mortars by the Pakistani army from their checkpoints. We are not only attacked from the Pakistani soil, but we are also attacked by the Pakistani army," Masoud Karimi, an Afghan army commander, told CNN.FULL STORY