NATO reported Friday the deaths of two more troops in a major offensive in southern Afghanistan, bringing to six the total killed in one day's fighting. The nationalities of the two soldiers were not given, according to policy, in a brief statement by NATO's International Security Assistance Force (ISAF). "Two ISAF service members died yesterday during Operation Mushtarak in southern Afghanistan," it said, referring to a showcase offensive in a poppy-growing region of Helmand province that began a week ago. "One service member was killed by small-arms fire and another died following a separate small-arms fire incident," it said.