According to Thompson, anxious students hid under their desks during the shooting incident.
The incident happened at a school in the northern North Carolina town of Winston-Salem. Schools in the area were closed as a precaution.
Monday there was already one school shooting in North Carolina. At a school in Wilmington, a student was injured when a 15-year-old schoolmate opened fire. The student has been arrested on suspicion of attempted murder.
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