LONDON (AP) -- Another horse racing doping investigation has been opened in Britain after trainer Gerard Butler admitted to giving horses a product that contained anabolic steroids.
The British Horseracing Authority says a "number of positive samples" were obtained from horses at Butler's yard following a visit in February.
An initial BHA investigation established that the source of the positive samples was a veterinary product that was recommended by a vet and legally imported.
The BHA says the "investigation remains ongoing and a number other parties have been and will be interviewed."
Trainers have been warned the product shouldn't be used because it contains an anabolic steroid.
Last week, another trainer, Mahmood Al Zarooni, was banned for eight years after he admitted to administering anabolic steroids to 15 horses in his care.