PITTSBURGH — Chicago police located eight stolen school buses at a city metals recycling facility, with the owner arrested on unrelated charges.

After Chicago-based Sunrise Bus Co. & Charter Services reported the buses missing early March 8, authorities used the vehicles’ on-board GPS devices to locate them at Gonzalez Auto Parts Inc., also in Chicago.

Auto Parts owner Sergio Quintero was charged with possession of title or registration without assignment, a felony, according to the Chicago Police Department.

"The single count for which Quintero appeared in bond court today stems from information uncovered during the investigation into the school buses stolen," the department said. "The charge relates to a separate motor vehicle. The investigation into the stolen buses remains ongoing at this time."

Quintero is charged with not having a proper title to his car, but he faces an investigation into how the stolen 40-foot-long school buses wound up in his yard. The buses were found at the salvage yard in various states of disassembly, and some of them had been shredded, police said. Quintero was reportedly found hiding in the false ceiling of the scrapyard’s office.

Three additional people were taken into custody at the shredding operation, and the matter is still being investigated.

Quintero couldn’t be reached for comment, and the company’s phone is now disconnected.