Officials have determined that the white powder found at Eli Whitney Elementary School this afternoon is flour from a homemade stress ball belonging to one of the students.
Police say the stress ball exploded in the hallway near the main office door, making a mess. The student left without telling anyone what had happened.
Police responded to the scene around 3:15 p.m. when the powder was first discovered. Officials say 12 adults were in the area, but most of the students had already gone home.
A crew from the state Department of Energy and Environmental Protection arrived to run tests and help identify the powder.