Around 100 to 200 militants from JNIM attacked the Burkinabe military base in Bourzanga at 5am on May 21.[2][3] A Burkinabe security source told RFI that the soldiers at the base were prepared for the attack and had known about the jihadists' plan to attack the base for several days.[2] Around a hundred Burkinabe soldiers and VDP were present in Bourzanga at the time of the attack.[4] The attack was repulsed by French fighter jets from Niamey and Burkinabe helicopters flying over the battlefield and bombing the jihadists.[2][5]
The Burkinabe general staff gave an initial toll of thirty jihadists killed, which later rose to 35 killed.[2][3] The bodies of dozens of attackers were presented on national television following the attack.[6] An armored vehicle, forty motorcycles, two pick-ups, and numerous weapons were captured by Burkinabe forces.[3] French officials said dozens of jihadists were killed or injured, and later clarified that 45 jihadists were killed.[4] Five Burkinabe soldiers were killed and ten were injured.[2]