Police investigating recent bomb threats at Edison High School searched the 16-year-old's Harmon Road home.
Officers say they found fireworks, shotgun shells and makeshift devices containing gun powder and fuses.
Police Chief Thomas Bryan tells The Home News Tribune (http://mycj.co/12NR9SW ) his detectives averted a possible tragedy.
The boy was released to a family member. His name was not released because he's a juvenile.
Police do not believe he's connected to the bomb threats and that investigation continues.
Information from: Home News Tribune (East Brunswick, N.J.) , http://www.mycentraljersey.com