COLUMBIA - Doctors say the South Carolina teen accused of plotting to blow up his high school is competent to stand trial.

Federal prison psychiatrists wrote in documents unsealed this week that 19-year-old Ryan Schallenberger was not insane at the time of his alleged crimes.

In March, a federal judge ordered a second evaluation for Schallenberger after his attorneys argued he was insane when he allegedly ordered ammonium nitrate to make bombs for a suicide attack on Chesterfield High School.

Evaluators also wrote Schallenberger is not suicidal but needs to keep taking psychiatric medication.

Schallenberger was arrested last year after his parents received a package addressed to him containing ammonium nitrate. A federal agent testified Schallenberger told officers he wanted to die, go to heaven and kill Jesus.