Gen John Campbell, the commander of NATO's Resolute Support Mission which is training Afghanistan's security forces, has appointed US Army Maj Gen William Hickman and two brigadier generals to continue the investigation begun by Brig Gen Richard Kim, NATO said in a statement.
"We will be forthright and transparent and we will hold ourselves accountable for any mistakes made," the statement quoted Campbell as saying. "While we desire the investigation to be timely, what's most important is that it be done thoroughly and correctly."
The international medical charity, which is also known by its French acronym MSF, said yesterday it is trying to determine the identities of seven bodies found in the wreckage which were unrecognizable and have since been buried.
US President Barack Obama has apologised for the attack, which happened as Afghan forces battled Taliban insurgents who had stormed Kunduz on September 28 and briefly held the city of 300,000, the first provincial capital they have overrun since being forced from power in late 2001.