Salgado said the wounded peacekeepers had been evacuated for medical treatment. Such attacks have become increasingly common in northern Mali, where a number of Islamic extremist groups are active. Earlier this month, an attack on a U.N. camp in Timbuktu killed seven people.
The U.N. mission has been working to stabilize Mali, where jihadists seized control of the north in 2012 before a French-led military operation scattered them the following year. U.N. convoys and the Malian military have been frequent targets.