The UN Security Council and Secretary-General Antonio Guterres condemned the attack on the road between Tessalit and Aguelhok.
The UN peacekeeping mission said the wounded peacekeepers were evacuated to the city of Kidal for treatment.
The UN's most powerful body and the secretary-general underlined that attacks targeting peacekeepers "may constitute war crimes under international law."
Guterres urged Mali's government and armed groups to accelerate implementation of a peace agreement, UN deputy spokesman Farhan Haq said.
The 12,000-strong UN peacekeeping mission in Mali has become the most dangerous in the world as Islamic militants routinely attack U.N. convoys across the north.
At least 80 peacekeepers have died in "malicious acts" since the mission was established in 2013, according to UN peacekeeping data as of the end of August.
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)