Amherst police have made an arrest for a bomb threat at Williamsville's Mill Middle School on Monday.  Police arrested a 12-year old Mill Middle School student on Wednesday.

The student is charged with making a terroristic threat.  The case will be referred to Family Court.

Meanwhile, police continue to investigate a series of bomb threats at Transit Middle School also in the Williamsville District.  The threat led to evacuations at the school.  No arrests yet in those cases.