NEW : International Security Assistance Force force expects no impact on ability to carry out operations . Afghanistan suspends convoys into U.S. through key mountain pass . Peshawar was used to carry food and military supplies to U.S. troops . Militants seized Pakistan humvees , food aid in ambush earlier this week .
NEW : NATO force expects no impact on ability to carry out operations . Pakistan suspends convoys into Afghanistan through key mountain pass . Route was used to carry food and military supplies to U.S. troops . Militants seized U.S. humvees , food aid in ambush earlier this week .