KY3-TV (Springfield, MO) reports that the Harrison School Board voted unanimously to expel a 13-year-old junior high student for the rest of the year.
The station reports that the student admitted writing a note earlier this month saying a bomb would go off at the school. Police arrested him the next day.
Four students have been kicked out since the threats began last fall -- two permanently. Authorities say two of those kicked out could face adult criminal charges.