NEW JERSEY (United States) – Five New Jersey 5th graders, ages 10 and 11, were arrested yesterday after teachers discovered their plot to “bomb” another school’s assembly. Police say the young students at Clifton Elementary School 11 made a “device” out of cinnamon and vinegar.

Police in Clifton, New Jersey, say five fifth-grade students were arrested after they allegedly planned to set off explosives at the local high school. According to Clifton police, the students at School 11 were found with written plans for attacks at Clifton High School.

It would not have exploded, obviously. That didn’t stop Clifton police from taking the adorable little plotters—four girls and one boy—into custody yesterday. They were released to their parents after questioning, and no charges have yet been filed.

Sgt. Robert Bracken, a spokesman for the Clifton PD, stressed to NorthJersey.com that the kids’ plot was not a prank. “They didn’t have the right equipment, but the intent was there,” he said.

“This is very disturbing,” a grownup said about children who made a cinnamon “bomb.”

Police say the 5th graders were targeting an assembly at Clifton High School, where the big kids go. PIX 11 reports that they have been suspended from school for the time being.

Police were contacted after staff at Clifton Elementary School in New Jersey discovered written plans to attack the assembly at the Clifton High School during a field trip.

A ‘device’ was also found, though a police inspection revealed it contained no explosives and instead was filled with vinegar and cinnamon.

All five of the fifth graders were released to the custody of their parents Wednesday evening. All of the students involved in high school bomb threat were suspended. Although no charges have been filed against the elementary school students yet, police note that the investigation into the planned attack is still ongoing.