Investigators at Kern Valley State Prison are cracking down on contraband making its way into the facility.

Court documents obtained by 23ABC show that back in September officials with the prison found a drone by their medical trailer.

The drone had a camera and a modified release mechanism covered in electrical tape to prevent it from being seen at night.

Inside a black cloth bag, officials found three cellphones, several chargers and SIM cards.

The drone photo in this article is not the drone found at the prison.