According to Allen Kenitzer, spokesman for the Federal Aviation Administration (FAA), on Monday, the Northrop N-9M crashed into Norco's California Rehabilitation Center jail yard.
The FAA stated that only one pilot was aboard the single-engine aircraft. The condition of the pilot was not clear.
It was also not clear whether prisoners were in the yard at that time.
The FAA and the National Transportation Safety Board will investigate the accident.
The medium security penitentiary is located approximately 50 miles east of Los Angeles.