Two International Human rights organizations have accused the u. S. Of violating International Law, a charge that u. S. Officials strongly deny. We have more on this story. Reporter tony this, comes just a few weeks after president obama declared publicly that americas use of drones is legal, and only targets enemies of the United States. But the reports release today charge the United States with indiscriminate killing of civilians. Reporter the drone strikes in the tribal area of pakistan. Investigators say they researched nine of 45 known drone attacks which occurred between january 2012 and august of 2013, in one strike they claim 18 laborers were reportedly killed. The most challenging situation we had to face was the complete and utter secrecy of the u. S. Authorities. Because of that we cannot be 100 certain but we are extremely concerned that these and other killings documented in our reports may constitute war crimes. Reporter expressing concern about u. S. Drone policy. More