Little information is known about the FBI's visit to a Eureka businesses on Tuesday.
An FBI Springfield spokesperson confirmed agents were at Preferred Care Medical Center, located at 1932 S. Main Street, conducting "court-authorized law enforcement activity."
The FBI declined to provide any further information.
Preferred Care Medical Center's website describes the business as a chiropractor's office. COVID-19 antibody testing, massages, and rehabilitation are among the other services offered.
