Bomb threats are on the rise in New Jersey's schools.
The state's Homeland Security and Preparedness Office says schools have been evacuated at least 61 times this school year, a 27 percent increase over last year.
There were 19 evacuations in April, with an increase after the Boston Marathon bombings on April 15. Most took place on Mondays and Thursdays and were usually triggered by a note or graffiti.
Authorities have charged three juveniles in connection with three of the six bomb threats made since December at Delaware Valley Regional High School and Alexandria Middle School.