"The members of the Security Council called on the Government of Mali to swiftly investigate this attack and bring the perpetrators to justice and stressed that those responsible for the attack should be held accountable. They underlined that attacks targeting peacekeepers may constitute war crimes under international law," the Council said in a Friday statement.
The radical Ansar Dine group has reportedly claimed responsibility for the Friday attack.
Mali has been in crisis since a 2012 coup attempt as several insurgent groups – including Islamic extremists — have been fighting against the Malian government in an attempt to gain independence or greater autonomy for the country's northern region.
The UN mission has been present in the country since 2013.
The Friday attack coincided with a visit to the region by UN Special Representative Mahamat Saleh Annadif, who was appointed head of the Mali peacekeeping operation in December 2015.