5th-Graders Busted in Attack Plot Against School Kids accused of bringing vinegar, cinnamon mix to school By Newser Editors and Wire Services Posted Dec 3, 2015 10:46 AM CST 76 comments Comments But it was non-explosive. (Shutterstock) (Newser) – Five fifth-graders in northern New Jersey were suspended after they were detained by police for allegedly plotting to attack a high school during a field trip. The students from School 11 in Clifton were detained on Wednesday after allegedly bringing a device filled with vinegar and cinnamon to school. The device was later determined to be non-explosive, but Detective Sgt. Robert Bracken tells NJ.com, "It was not a prank." Police tell News 12 someone may have helped the students, who are 10 and 11 years old, come up with the plan. The students were caught when teachers and administrators found written plans on how the alleged attack would occur, authorities say. The school then contacted police. The students were released to their parents' custody and were suspended. No criminal charges have been filed and the investigation is ongoing.