At least three soldiers were injured and four militants killed when a group of Afghan assailants stormed an army check post in Pakistan's northwest tribal area of Kurram Agency on Thursday morning, local media reported. ARY TV said that in a pre-dawn incident, the militants coming from Afghanistan attacked the check post located in Ali Zai area of Lower Kurram Agency, a militancy-hit tribalregion at Pakistan Afghan border. By using sophisticated weapons, the militants injured three soldiers and destroyed the check post partially, said that report. The troops countered the attack with full force, killing four militants and injuring six others. The attackers fled the scene leaving bodies of their accomplices lying at the border area. The injured troops were shifted to a nearby hospital for medical treatment. No group claimed responsibility for the attack yet.