Federal agents served search warrants at Best Care Pharmacies in Bridgeport, Belington, Lumberport, and Weston Wednesday morning.
The Harrison County Drug Task Force and Drug Enforcement Administration officials were at the pharmacies.
The U.S. Attorney's Office would not comment on the situation, and added that it would not provide comment until an arrest is made.
The Local Task Force, Medicaid Fraud Control Unit, Drug Enforcement Agency were all on scene at the Best Care Pharmacy in Weston.
Check back for updates.