Goldolphin racing outfit endures 'dark day' after dope tests Mahmood Al Zarooni . . . all 11 Godolphin horses which tested positive came from his yard in Newmarket, England Source: News Limited THE powerful racing outfit Godolphin Operation is under a cloud after 11 of its horses tested positive for anabolic steroids. A costly one as well as all the horses who tested positive are barred from racing until further notice by the British Horseracing Authority, British racing's governing body, who will also hold a disciplinary hearing into the case. Among those who tested positive was unbeaten filly Certify, who was vying for favouritism for next week's English 1000 Guineas, the first fillies classic of the season and run over a mile. Because the horses involved were not racing at the time, I did not realise that what I was doing was in breach of the rules of racing. "I can only apologise for the damage this will cause to Godolphin and to racing generally," added the 37-year-old, who has largely superseded Godolphin's first trainer Saeed bin Suroor as their main handler. A statement on the Godolphin website read: "Following an inspection of Zarooni's stable by officials from the BHA, traces of prohibited substances were discovered in a number of the horses tested, including Certify. The BHA has advised that, as a result, the filly will not be allowed to take part in the Qipco 1000 Guineas at Newmarket next month. Al Zarooni has admitted that he was responsible for the administration of the prohibited substances. Godolphin racing manager Simon Crisford said that Sheikh Mohammed had ordered a full internal review be carried out. This is a dark day for Godolphin. We are all shocked by what has happened. His Highness Sheikh Mohammed was absolutely appalled when he was told and this is completely unacceptable to him. We will await the outcome of the BHA inquiry before taking any further internal action. Sheikh Mohammed has instructed me to begin an urgent review of all of our procedures and controls. That is already under way and we will take advice from the BHA in completing it. The BHA said that on April 9 this year samples analysts' findings will take plended period of time. As part of the ongoing process a decision will be made as to what period this suspension will be imposed for. The BHA understand the importance of this process being carried out as quickly as possible because of implications for betting markets. A date for the hearing has yet to be announced.