Officials say they may never know the origin of body parts found in a South Texas landfill two weeks ago.

Port Arthur landfill manager Micheal Tentrup says nine human ankles were found in biohazard bags Sept. 28. Only one biomedical company contracts with the landfill.

But BioMedical Waste Solutions President Wes Sonnier says his company isn't to blame.

He says BioMedical Waste is only licensed to handle medical supplies. The Beaumont Enterprise reports that the company is not licensed to handle body parts.

The Texas Commission on Environmental Quality says body parts should be incinerated, buried or treated with chemicals or steam, or both, and then dropped off at a sanitary landfill.

Port Arthur police initially said the parts were believed to be from medical practices such as amputations.