Eighty others were wounded in the co-ordinated attacks in the capital Ouagadougou, which follow two other major assaults there in the past two years.
The group, Jama’a Nusrat ul-Islam wa al-Muslimin (JNIM), often uses Alakhbar and other Mauritanian news agencies to claim responsibility for strikes against civilian and military targets across West Africa’s Sahel region.
Alakhbar, citing a message from the group, reported the attacks were carried out in response to the killing of one of JNIM’s leaders, Mohamed Hacen al-Ancari, in a recent raid by French forces.
France intervened in Mali in 2013 to drive back Islamist militants who had seized the country’s desert north. It retains about 4000 troops deployed across its former colonies in the arid Sahel region as part of the anti-terror Operation Barkhane and has aggressively gone after militant group leaders.