At least 8 militants were killed and dozen other sustained serious injuries in fresh offensive of security forces in two different areas of Lower Orakzai agency on Thursday. Security forces used helicopters and heavy artillery and targeted compounds of militants in Goween and Shereen Darra of Lower Orakzai Agency, sources informed Online. The forces also secured important heights in the area and have also seized arms and ammunition. Troops have taken control of most areas of the agency and are advancing towards Upper Orakzai Agency, sources said. Security forces backed by gunship helicopters have killed over 300 Taliban militants so far in Orakzai since late March when the army launched a fresh offensive in the agency to flush out Taliban. Security forces intensified assaults in the restive northwest over the past year, largely clearing militants from the tribal areas along the Afghan border. On the other hand, some unidentified militants blow up three schools in different areas of Mohmand agency. The explosive material planted by militants alongside three schools including Primary Schools for Boys, Primary School for Girls and Government High School in three different areas of Tehsil Anbar, exploded with bang, destroying the buildings completely.