ROUGH CUT (NO REPORTER NARRATION)<br/> <br />Three members of Afghanistan's national security force were killed on Thursday when a motorcycle loaded with explosives blew up in the eastern city of Khost, authorities said.<br/> <br />The provincial governor's spokesman, Baryalai Rawan, said the incident took place in Khost city on Thursday afternoon after a vehicle of the Afghan NDS operatives struck with a roadside bomb.<br/> <br />He added that three NDS operatives were killed and two others were injured following the explosion.<br/> <br />Another security official speaking on the condition of anonymity said that the NDS operatives were killed after a motorcycle packed with explosives went off near the vehicle of the intelligence operatives in Khost.<br/> <br />The the impact of blast shattered windows in nearby buildings and damaged several cars.<br/> <br />An eyewitness said the blast took people by surprise.<br/> <br />"I was taking away goods from my shop and suddenly an explosion happened. Some people said it was a
