HUTCHINSON, Kan. (AP) — Two Kansas teenagers have been sentenced to 45 months in a juvenile correctional facility after planning to detonate pipe bombs at their high school. The youths, 14 and 15, were arrested March 8 after Hutchinson High School administrators were tipped off about their bomb plot.

Both were convicted of conspiracy to commit capital murder.

Investigators found what’s been called “detailed plans to harm students and faculty” in the boys’ possession. That included notes and materials for constructing bombs and surveillance logs on staff members.

A Reno County District Court clerk says the 15-year-old was sentenced Tuesday while the 14-year-old was sentenced last month.

Both are subject to three years of aftercare once they have finished their prison sentences.