Security Forces have killed six Khwarij in South Waziristan District.According to the ISPR, during exchange of fire, four brave sons of soil Havildar Nisar Hussain, Naik Rashid Gul, Naik Irfan Ullah Khan and Sepoy Usman Rafaqat, having fought gallantly, embraced Shahadat.The statement said Security Forces of Pakistan are determined to wipe-out menace of terrorism and such sacrifices of our brave soldiers further strengthen our resolve.Source: Radio Pakistan