A remote-controlled bomb attack killed a security official and injured nineteen others near the troubled tribal areas of Pakistan Friday, officials said. The attack took place on the convoy of security forces at the Wana Road near Tank in the North West Frontier Province (NWFP). The convoy was traveling from Tank to Dera Ismail Khan when attacked, military spokesman Maj-Gen Waheed Arshad said. Five of the injured security personnel were said to be in a critical condition.