<br/>In Afghanistan, eight security guards have been killed by gunmen who opened fire on them in northern Parwan province. <br/><br/>The spokeswoman for the provincial governor in Parwan today said, two guards were also wounded in the attack that occured in Bagram district last night. <br/><br/>She said, the guards were attacked on their way to work at Bagram airfield, the main US military base in Afghanistan.<br/><br/>No group has yet claimed responsibility for the attack.