Gardai have confirmed the seizure of over 2 million euro worth of anabolic steroids and other drugs in North Donegal.
Following searches in the county 60,000 vials were discovered.
Human growth hormones and products for erectile disfunction were also found alongside a substantial amount of cash.
The operation involved gardaí from Buncrana and Letterkenny, revenue enforcement officers from Letterkenny, Dundalk and Monaghan, and enforcement officers from the HPRA.
One person has been arrested and Gardai confirmed a cross border investigation alongside the PSNI is ongoing.