LOUISVILLE, Ky. — Federal agents have raided a Kentucky pain clinic as the FBI says it is investigating "multiple locations around Louisville."

Special agents with the Federal Bureau of Investigation and the U.S. Drug Enforcement Administration were sorting through boxes inside Bluegrass Pain Consultants on Tuesday.

The Courier Journal reports that federal agents were talking to patients who were at the clinic.

FBI spokesman David Habich says the agents were conducting "court-authorized law enforcement activity at multiple locations around Louisville as part of an ongoing investigation." He declined to comment further.

Bluegrass Pain Consultants has locations in Louisville and La Grange, Kentucky, according to its website. The group describes itself as providing treatment options for pain management, including consultations and medication.