This is reported by CNN, citing police chief Steve Drew.
According to the representative of law enforcement agencies, at the moment the child is detained by the police.
The injured teacher is in critical condition and her injuries, according to doctors, threaten her life.
It is clarified that this incident was not an accident and earlier there was a conflict between the teacher and the student.
As stressed by Drew, the police will have to conduct a thorough investigation and, in particular, find out how the firearms fell into the hands of a schoolboy.
Earlier it was reported about the death of several people in a shooting at a Walmart store in Chesapeake, Virginia.