The army regretted that the remains of five victims killed by the terrorists were also recovered at the scene.
The affected worship centres are the First ECWA Church and St. Augustine Catholic Church in Ariko.
He said investigations were ongoing to apprehend the fleeing suspects.
The COAS said he was glad to felicitate with officers, soldiers, and civilian staff of the Nigerian Army.
Mr Hassan said out of the five youth trafficked to Kwara, three had returned home and reunited with their parents.
The development was confirmed in a statement on Tuesday by the Commissioner for Internal Security and Home Affairs, Samuel Aruwan, in Kaduna.
The exact location of the incident is yet to be ascertained but detailed reports being awaited will clarify whether the incident occurred within the school premises or elsewhere.
Mr Tarfa advised serving officers and men of the Army to continue to be loyal and continue to demonstrate total commitment to duty.
The victims claimed to have escaped from captivity while the bandits on sentry were asleep, police said.
On sighting the security operatives, the bandits were said to have opened fire, leading to the troops returning fire.
