A Pakistan Army Captain and two soldiers were killed whereas two others were injured in an improvised explosive device (IED) attack in Upper Orakzai tribal region, officials confirmed. “The attack took place late last night when the security forces convoy was targeted in Arkhanjo Mamozai village in Upper Orakzai tribal region," the Frontier Corps media spokesperson Major Fazl told Dawn.Com. Two other Army personnel were also injured in the attack, officials said. Security forces launched a search operation in the area after the incident. According to officials most of the region is now under the control of administration and the last pockets of resistance, in Upper Orakzai tribal region along the border of Tirah Valley of Khyber region and the adjoining Kurram Agency, are being cleared of militants.