Nigeria, Dec. 14 -- The United Nations Secretary-General Antonio Guterres condemned the drone attack on a UN facility in war-torn Sudan, killing six peacekeepers on Saturday.

The attack targeted a peacekeeping logistics base of the UN Interim Force for Abyei (UNISFA) in Kadugli, a city in central Sudan.

The peacekeepers affected by the strike are Bangladeshi nationals serving with the UN Interim Security Force.

In a statement issued on Saturday, Mr Guterres condemned the attack, saying it constituted an unjustifiable war crime.

"I strongly condemn the horrific drone attacks that targeted the @UNISFA_1 logistics base in Kadugli, Sudan, resulting in fatalities & injuries of members of the Bangladeshi @UNPeacekeeping contingent.

"Attack...