SILOAM SPRINGS — A college student in Arkansas has been accused of engaging in criminal acts involving explosives after writing that "the maniacal side" of his brain was a "fun little guy" who wanted to inflict mass casualties on society.

Prosecutors say 20-year-old Timothy Constantin of Gainesville, Florida, is expected to have a bond hearing Thursday. Constantin attends John Brown University, a private, Christian college in Siloam Springs.

Detective Ron Coble said Constantin had built small bombs with PVC pipe and black powder collected from fireworks and ammunition. A student told Coble that Constantin wanted to kill himself to prevent his committing a terrorist attack over the upcoming winter break.

Officers said they found firearms and ammunition in Constantin's dorm room, but no explosives.

Benton County's prosecutor's office did not know whether Constantin had a lawyer ahead of Thursday's hearing.