A roadside bomb exploded near a military convoy in troubled northwestern Pakistan on Friday, killing at least one soldier and injuring 13 others, officials said. The troops were traveling from Wana, the main town in South Waziristan, to Tank, 40 kilometers (25 miles) northwest of Dera Ismail Khan, said an army official. A local security official, who also didn't want to be named, confirmed the attack, saying the dead and injured had been transported to a hospital, where some were listed in critical condition. Army spokesmen were not immediately available for comment.