Student injured when device detonates at Lake Mary prep

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LAKE MARY, Fla. —

Police said a student at Lake Mary Preparatory School was injured when an explosive device detonated on campus early Tuesday evening.

Dispatchers received calls reporting some type of explosion at the school on Rantoul Lane shortly before 5 p.m.

"We had a report of an injured young man, a 15-year-old, who was injured when he pulled on a device and that device went off in his hand," Zach Hudson with the Lake Mary Police Department said.

The device, which police called a "blasting cap," was in the student's backpack and detonated when he reached in to get a textbook, according to investigators.

"It's not much more than a powerful firecracker in all reality," Hudson said.

Police said the student apparently thought it was OK to keep the device in his backpack.

"It appears by what we know right now that this was essentially a foolish accident," Hudson said.

Investigators don't plan to charge the student with a crime, even though the situation caused the school to go into a lockdown. Police said a second device was also found with the student's belongings and it was taken to be destroyed.

It's possible that the unidentified student will be expelled from school, according to police. He suffered minor injuries in the incident.