A warehouse in Fresno County, California has been the site of a massive remediation project and investigation after it was discovered to be an illegal, unlicensed laboratory full of lab mice, infectious agent samples, medical waste, and hazardous materials.

The Fresno County Public Health Department has been “evaluating and assessing the activities of an unlicensed laboratory” in Reedley, the health department’s assistant director, Joe Prado, said in a statement Thursday. All of the biological agents were destroyed by July 7 following a legal abatement process by the agency.

“The evaluation required coordination and collaboration with multiple federal and state agencies to determine and classify biological and chemical contents onsite, in addition to assessing jurisdictional authority under this unique situation,” Prado said.

According to court documents, city officials inspected the location at 850 I St. on March 3 for building violations and found various chemicals being stored. On March 16, an inspection by county public health officials allegedly turned up medical devices thought to have been developed on-site, such as Covid and pregnancy tests.