The racehorses involved up in the Newmarket doping scandal have been suspended from running for six months.
The British Horseracing Authority said the 15 horses in question have been suspended from racing from 9 April, the day they were tested until 9 October.
– Jamie Stier, British Horseracing Authority
"The length of suspension reflects the period beyond which the BHA is confident that the horses in question can have derived no performance-related benefit from the administration of these prohibited substances."
The decision on the horses was made by the BHA itself, rather than the disciplinary panel hearing the inquiry into trainer Mahmood Al Zarooni.
Newmarket racehorse trainer Mahmood Al Zarooni is appearing at the British Horseracing Authority headquarters to face a disciplinary hearing over doping.
Al Zarooni was surrounded by a media scrum as he entered the building in central London with Simon Crisford, spokesman for the Godolphin operation, but did not speak to waiting reporters.
The trainer was charged after tests on 11 of his horses showed the presence of anabolic steroids.
He could lose his licence as a result of the hearing, in what is one of the most significant doping scandals in recent racing history.
Newmarket-based trainer Mahmood Al Zarooni has officially been charged with rule breaches related to prohibited substances, duty to keep medication records, and conduct prejudicial to racing.
The 37-year-old will stand before a disciplinary panel of the British Horseracing Authority on Thursday afternoon after samples taken from 11 of his horses were found to have contained traces of anabolic steroids.
Al Zarooni is the trainer for Sheikh Mohammed's Godolphin stables. His Highness has condemned al Zarooni's actions, and will hold an internal inquiry into the affair.
Al Zarooni could lose his training licence for this, one of the most significant doping scandals in recent racing history.
Eleven horses from the Newmarket-based Godolphin stable have tested positive for anabolic steroids in one of the biggest doping scandals in British racing's history.
Godolphin's owner, Sheikh Mohammed is said to be appalled by the news and one of his top trainers is to face a disciplinary hearing. A number of high profile horses have been withdrawn from races.
Click below to watch a report from ITV News Anglia's Sports Correspondent Donovan Blake:
Eleven horses from the Newmarket-based Godolphin stable have tested positive for anabolic steroids.
Godolphin trainer Mahmood Al Zarooni is to face a disciplinary hearing, and a number of the stables' top horses have been withrawn from upcoming races.
Click below for a report from ITV News Anglia's Sports Correspondent Donovan Blake in Newmarket.
Horse racing commentator Derek Thompson says he was stunned when he heard the news that 11 horses at the Godolphin stables in Newmarket were tied up in a doping scandal.
He said: "This news is stunning. Eleven horses tested positive, not one or two who might have been ill. That is not good news."
Click on the video below.
A statement on the Godolphin website read: "Following an inspection of Zarooni's stable by officials from the British Horseracing Authority, 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."
Godolphin trainer Al Zarooni based in Newmarket said on www.godolphin.com: "I deeply regret what has happened. I have made a catastrophic error.
"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."
Newmarket-based Godolphin trainer Mahmood Al Zarooni is to face a British Horseracing Authority disciplinary panel hearing after samples taken from 11 horses in his care in the Suffolk home of horse racing were found to contain traces of anabolic steroids.
Al Zarooni, who won the Ladbrokes St Leger at Doncaster last year with Encke, as well as the richest race in the world, the Dubai World Cup, with Monterosso, has trained a whole host of big-race winners since joining Sheikh Mohammed's operation.
Al Zarooni told the Godolphin website he had made a "catastrophic error".