Gunmen have launched twin attacks in the capital of Burkina Faso, Ouagadougou, against the French embassy and army headquarters, the BBC reported on Saturday.
Eight security personnel and eight attackers were killed in the fighting while 80 people including civilians, were wounded, officials say.
French Foreign Minister Jean-Yves le Drian said there was no doubt it was an act of terrorism.
It is was not immediately clear who had carried out the attack.
Burkina Faso Security Minister Clement Sawadogo said there had also been a suicide car bomb attack at the military HQ that may have intended to target a regional anti-terrorism meeting.
A room was destroyed by the blast, he said, but the meeting had been moved to another location.