From Omaha World Herald
A prison disturbance Tuesday that required the firing of a warning shot to quell it followed a change in mealtime procedures at the Nebraska State Penitentiary.
The change restricted the number of inmates who could eat in the dining hall at any given time and went into effect at the evening meal on Tuesday. Afterward, some inmates ignored multiple orders to return to their housing unit.
Groups of inmates throughout the prison then became defiant and verbally aggressive, according to a Corrections Department press release. After a group of inmates gathered and converged on staff, a warning shot was fired from a tower.