A nutrition company owned by the same company that owns the Atlanta Braves is selling steroids over the Internet, according to allegations in court papers unsealed Thursday.

The nutrition company, BodyBuilding.com, is selling dietary supplements that contain steroids and designer steroids, including a substance found in the raid on the Bay Area Laboratory Co-operative in 2003, the court papers said.

Federal authorities unsealed a search warrant on Thursday after agents raided the headquarters and a warehouse of BodyBuilding.com in the Boise, Idaho, area. In 2008, Liberty Media purchased a controlling stake in BodyBuilding.com for over $100 million. Liberty Media bought the Braves from Time Warner in 2007. Among the other businesses in which Liberty Media has interests are QVC, Ticketmaster and DirectTV.

The raid was part of an ongoing effort by the Food and Drug Administration to target companies that are selling steroids as dietary supplements. Unlike drug makers, which must demonstrate that a drug is safe and effective before the agency approves it for sale to the public, dietary supplements are a largely self-regulating industry.