We have also consulted satellite evidence, sent to us by the Office of the United Nations High Commissioner for Human Rights on the ground. The issue is that direct access to the mass graves is impossible right now without the permission of the Burundian authorities. Clearly, light must be shed on their existence and magnitude. The data show that there are almost 600 bodies in some graves. We have received the data from NGOs. At any rate, for now, we are not able to check on the ground the existence and size of those mass graves.
On October 6th, 2016. See this statement in context.