QUETTA, March 21: At least five personnel of the Frontier Corps were killed and four others, including a senior officer, seriously injured in an armed attack on Wednesday on an FC convoy near a village along the Pak-Afghan border in the Nokundi region of Chagai district, some 450 km south-west of here. "All five FC soldiers were killed on the spot," official sources said. The injured were immediately shifted to the CMH in Quetta by a helicopter, they added.