KINGSTON — A 16-year-old Kingston High School student was placed on emergency expulsion after being detained for bringing a part of a grenade to school.

The student was not taken into custody. The case will be handled by the Kitsap County Prosecutor’s Office.

A classroom was evacuated Monday as a precaution after a student notified school administrators that another student had part of a hand grenade, according to Kitsap County Sheriff’s spokesman Deputy Scott Wilson.

The student was detained by school security and placed in the conference room.

The call to county sheriffs came at 1:43 p.m. A deputy arrived at school at 2:32 p.m., according to Wilson.

The student, according to a report by the deputy, admitted to taking a grenade  fuse to school to “fix part of it.” An explosives ordnance technician determined the fuse was inert, according to Wilson.

The fuse was from an M228 grenade, originally designed as a practice grenade. According to Wilson, the piece of grenade was purchased on eBay.

Along with the grenade fuse, Wilson said an unspecified amount of ammunition was found in the student’s backpack. The type of ammunition was not known to him.

In a letter to parents, KHS Principal Christy Cole wrote, “It was reported that a student had some soft pellets used for air guns and what appeared to be a pin from the top of a grenade stored in his backpack.”

Wilson said the student told the deputy he forgot to clean his backpack out after coming to school. The “ammunition” was from the weekend.

Wilson said the expelled student just “has an interest in this stuff.”

North Kitsap School District spokeswoman Robyn Chastain is not aware of an incident like this happening before at KHS.