At least five militants were killed Monday when a bomb they were planting on a roadside, exploded prematurely in Pakistan\'s north-western tribal region, an official said. The predawn incident took place in the Akakhel area of Khyber, one of seven tribal districts, according to a report of DPA. Major Fazalur Rehman, spokesman for the paramilitary Frontier Corps, said all five killed belonged to a banned group.