The British Horseracing Authority says it has been reassured a consignment of unlicensed veterinary products seized from a farm owned by Sheikh Mohammed has no link to the racing industry.
Moorley Farm is listed as owned by Darley Stud Management Co Ltd, the banner company of Sheikh Mohammed's breeding operation.
Sheikh Mohammed's then-Godolphin trainer Mahmood Al Zarooni hit the headlines in April when banned for eight years after samples taken from a number of horses in his care were found to contain traces of an anabolic steroid.
"This issue is a matter for Defra (Department for Environment, Food and Rural Affairs)," BHA spokesman Robin Mounsey said.
"The BHA became aware of the seizure from Moorley Farm as a consequence of our existing working relationship with Defra, as two regulatory bodies with interests which are occasionally shared.
"Defra notified us of the seizure of veterinary care products which are not all licensed for use in the UK. They also clarified that in the view of the Defra there is no link between the seizure and the racing industry and the products were not intended for use on thoroughbreds.
"The property in question is not licensed by the BHA and we understand it is not part of Darley's racing operation."
Darley Stud director Liam O'Rourke said the farm was not part of the thoroughbred operation.
A posting on vmd.defra.gov.uk read: "Moorley Farm East, Newmarket. 124 veterinary medicinal products were seized because they were not authorised in the UK and had not been imported into the UK in accordance with the regulations.
"These medicines, in varying quantities, were to be used on horses and included injectables, anaesthetics, anti-inflammatories and antibiotics."