At least 10 soldiers have been killed in a "terrorist" attack on their camp in the Timbuktu region of northern Mali, a military source says.
Another military source confirmed Monday's ambush (local time), saying it had targeted a unit of the National Guard based in Gourma-Rharous and left around 10 men dead.
The second source said the attackers were believed to be "jihadist elements" linked to Islamist group Ansar Dine.
The attack comes two days after two Malian soldiers were killed and four others injured in an ambush in the centre of the west African country.
Jihadist attacks have long been concentrated in Mali's north but began spreading at the beginning of the year to the centre of the country and, in June, to the south, near the borders with Ivory Coast and Burkina Faso.