The Malian military says it has deployed additional troops to an area of the country where Tuareg rebels have been attacking army bases.
A military statement did not give details of Sunday’s fighting in the town of Léré in the Timbuktu region.
It said recent military operations had significantly reduced what it called the threat of terrorism.
The violence between the Coordination of Azawad Movements (CMA) and the army is intensifying as thousands of UN peacekeeping troops were ordered to leave the country.
Al-Qaeda-linked jihadists are also carrying out attacks in the Timbuktu region.