ISLAMABAD — Dozens of militants armed with guns and gasoline bombs attacked a truck terminal in northwestern Pakistan on Thursday and burned five tanker trucks carrying fuel to NATO troops in Afghanistan, police said. NATO and U.S. commanders are seeking alternative transport routes into landlocked Afghanistan amid mounting assaults on the critical main supply line through Pakistan. Militants attacked the truck depot near the city of Peshawar before dawn, hurling gasoline bombs which set fire to the five tankers, said Abdul Khan, a local police official. Security guards fled and the assailants made their escape before police arrived, Khan said.