Intelligence officials say one Pakistani soldier was killed and another wounded when a roadside bomb exploded during a foot patrol in northwestern Pakistan.

The officials say the incident occurred Wednesday in the Tiarza area of South Waziristan, part of Pakistan's semiautonomous tribal region where the army launched a massive ground offensive about a year ago.

The officials say Tiarza has generally been cleared of Taliban militants, but they periodically sneak back to plant bombs. They spoke on condition of anonymity because they were not authorized to talk to the media.