The October 3 air raid on the French charity's hospital during a Taliban offensive in the northern city of Kunduz killed at least 30 people, sparked an avalanche of global condemnation and forced the facility -- the only trauma centre in the region -- to close.
"The frightening catalogue of errors outlined today illustrates gross negligence on the part of US forces and violations of the rules of war," said MSF general director Christopher Stokes, responding to the earlier release of a US investigation into the attack that described it as "caused primarily by human error".
Campbell blamed the catastrophic accident in part on fatigue of US troops who had been battling the militant offensive in Kunduz for five days, adding that the mistake was "compounded by process and equipment failures".