Early on Saturday two UN peacekeepers and one civilian were killed by unidentified gunmen who attacked and fired rockets at a UN base in the northern Malian town of Kidal.
Olivier Salgado, a spokesman for the UN force in Mali (MINUSMA), announced that the attack caused casualties, though did not specify the number.
"The attack happened at around 4 am (0400 GMT). Four or five rockets landed inside the base. Quite a few people were wounded but it's too early for a precise number," Salgado told Reuters.
No further information was shared by the UN force in Mali.
Last week Al Mourabitoun - a militant group affiliated with Al Qaeda - attacked a Radison Blu hotel in Bamako, Mali's capital, killing at least 20 people and wounding several others.
Northern Mali fell under the control of Tuareg rebels and Al Qaeda affiliated groups in mid-2012, but a French-led operation in 2013 partially defeated the groups.
The UN Mission in the region was set up in 2013 to carry out security-related tasks with the aim of providing stability in the country and implementing a transitional road map.
The UN currently deploys more than 10,000 military personnel, some 1,180 police and an equal number of civilians on the ground in Mali.