North Miami police officers, responding to a report of a car accident, found a stolen vehicle that had crashed into a tree.
They also found an injured 10-year-old boy. At least one other person in the car, a 14-year-old boy who was driving, took off running.
That teen was later caught and taken to the hospital to be treated for an injury.
Rafael Estrugo, a spokesman for North Miami police, said the 10-year-old was airlifted to the hospital. His condition was not known. It is not clear if anyone else was involved.
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All occupants of the car could be facing charges, Estrugo said.
The car was reported stolen out of North Miami either Sunday or Monday, Estrugo said.