At least 14 UN peacekeepers were killed this week in the Democratic Republic of Congo during an attack on the UN's Monusco mission base in North Kivu.
Over 53 are reported to have been injured in the attack, believed to have been carried out by fighters alligned to the Allied Democratic Forces (ADF).
The attack was condemned "unequivocally" by the UN Secretary-General António Guterres.
“These deliberate attacks against UN peacekeepers are unacceptable and constitute a war crime” he said.
“There must be no impunity for such assaults, here or anywhere else," Mr Guterres added.