Police found the haul from at least ten tractor-trailers, worth as much as $2 million.
"We have grills in the boxes to my right. We have toners outside. We have tires. We have all sorts of property that we have recovered," said Det. Ralph Batres from the El Monte Police Department.
While police were doing the inventory, brothers Enrique and Francisco Fonseca showed up and were promptly arrested.
Police said they have not found the owners of the stolen property yet.
Anyone with information is urged to call the El Monte Police Department at (626) 580-2110.