General David M. Rodriguez, commanding general of US Army Forces Command, says the shooting of Afghan civilians was a "tragedy" and that the military would hold people accountable.
He was speaking at Joint Base Lewis-McChord, where Army Staff Sergeant Bales was based.
More top news
Police have arrested four men in connection to the suspected terror-linked murder of a police worker in Sydney.
Volkswagen could start recalling cars containing emissions cheating software in January, according to the firm's new chief executive.
A toddler survived for days on his own after his mother collapsed and died as she fed his one-year-old brother - who also choked to death.