The besieged soldiers killed at least 40 “terrorists” on Thursday before reinforcements arrived, the army said in a statement. The attack targeted the military detachment in Ougarou in the Est region.
Burkina Faso’s armed forces have battled rebels since 2015.
More than 10,000 civilians and members of the security forces have died, according to estimates, while at least two million people have fled their homes. One-third of the country lies outside of government control.
The ongoing violence has sparked anger within the military, fueling two coups last year that led to the ascent of the current leader, Captain Ibrahim Traore, in September.
He has promised to reconquer lost ground, but attacks on security forces and civilians have worsened since the start of the year, inflicting hundreds of deaths.
Traore has said he is committed to a plan by the preceding military administration to hold elections for a civilian government by 2024, Al Jazeera reported.
This latest violence comes as the armed forces were accused of indiscriminately killing civilians during anti-insurgency missions.