Officials in Pakistan say a bomb blast killed seven Pakistani soldiers and wounded 11 others Saturday in the northwest.
The incident took place in the Khyber region, which is the main route for moving supplies to international forces fighting in Afghanistan.
The violence comes a day after U.S. Secretary of State Hillary Clinton ended her confrontational visit to the country.
During her three-day trip, Clinton questioned why Pakistan has not captured al-Qaida leaders, saying "somebody, somewhere in Pakistan" must know where they are.
The secretary of state also defended U.S. policy to Pakistanis who voiced frustration with increasing violence in the region, including U.S. (drone) missile attacks on suspected militant hide-outs in the northwest.