Gunman attacked a terminal in northwest Pakistan on Friday holding supplies bound for US and NATO troops in Afghanistan, damaging five shipping containers, said police. International troops in Afghanistan transport up to 75 percent of their supplies via routes through Pakistan, but frequent attacks have forced the US military to explore alternate paths. Reliable supply routes will become even more crucial as the US deploys thousands of additional troops to Afghanistan this year. The assailants attacked the terminal on the outskirts of Peshawar city before dawn, torching five shipping containers before escaping, said police official Jarod Khan. "The terrorists first opened fire and then threw petrol bombs," he said.