Teen accused in school bomb plot made 'farewell' audio tape

An 18-year-old South Carolina student was in jail Sunday after he collected bomb-making supplies, including ammonium nitrate, in a plan to attack his high school, authorities said.

Ryan Schallenberger was arrested Saturday after his parents called police when 10 pounds of ammonium nitrate, an oxidizing agent in explosives, was delivered to their home in Chesterfield, near the North Carolina border, Chief Randall Lear of the Chesterfield Police Department told CNN.

The teen planned to make several bombs to detonate at Chesterfield in what Schallenberger called a "Columbine followup" in his journal, Lear said.

The police chief said Schallenberger's journal revealed his sympathies for the two teen-age gunmen who carried out the 1999 shootings at Columbine High School in Colorado. Those shootings left 15 people dead, including the shooters.