An investigation by Doctors Without Borders revealed that the death toll was much higher than originally counted from the U.S. airstrike on a medical charity hospital in Afghanistan on Oct. 3, NBC News reported.
The revised count of 42 people, up from at least 31 civilians, came after two months of an "in-depth investigation" in the Oct. 3 bombing of a trauma center run by Doctors Without Borders, also known by its French name Médecins Sans Frontières (MSF).
The U.S. Air Force claimed that an AC-130 gunship attacked the hospital because it mistakenly identified the building for a nearby compound being held by the Taliban.