A second patient was already at the hospital and “said something about there was a cardboard box in the alley and that the boys said it blew up when they hit it with their bikes," the officer said in the report.
Investigators have determined that is not what happened because there was no damage to the bikes.
Specialist Mike Grimes, commander of the bomb squad, said the explosion was caused by a modified pyrotechnic device that one of the boys ignited.
Police and fire units were dispatched to the scene about 7:45 Tuesday night for traumatic injuries to the boys.
The boy who was seriously injured was flown by helicopter to Cincinnati Children’s Hospital. The other boy sustained minor injuries, was treated at McCullough-Hyde Hospital and later transported to Cincinnati Children’s Hospital, according to Oxford police.
Multiple 911 calls were made from the scene. A male caller said there was a loud bang and there was a young kid “with blood all over him.”
He said he and others, including nurses from McCullough-Hyde Hospital, were with the boy.
Another woman sobbed, screaming, “no, no.”
She said, “a child has been badly injured.”